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USPTO Terms of Art — D to DIM

Glossary of USPTO Terms of Art

| A | B | C-CL | CM-CZ | D-DIM | DIM-DZ | E | F | G | H | I | J-K | L | M-MET | MET-MZ | N | O | P-PHA | PHE-PON | POR-PZ | Q | R | S-SEPA | SEPO-SMT | SN-STEM | STEP-SZ | T-TOG | TON-TZ | U | V | W | X-Z |

D.C. COUPLING (CLASS 330)
A signal coupling network including a D.C.. conductive path. In a four terminal network such paths must be traced between terminals on the circuits to and from which the coupling is made which vary in voltage with the signal (this excludes D.C.. paths limited to ground leads or D.C.. shunt paths).

D.C. PATH OR D.C. CONDUCTIVE PATH (CLASS 330)
A path for current in a network which can conduct D.C.. current.

DADBS (CLASS 438)
diacetoxyditertiarybutoxysilane

DADIS (CLASS 438)
diacetoxydiisopropoxysilane

DATA (CLASS 345)
Representation of information in a coded manner suitable for communication, interpretation, or processing. Also see: Address Data; Instruction Data; Status Data; User Data.

DATA (CLASS 705)
Representation of information in a coded manner suitable for communication, interpretation, or processing.

DATA (CLASS 706)
Representation of information in a coded manner suitable for communication, interpretation or processing.

DATA (CLASS 707)
Representation of information in a coded manner suitable for communication, interpretation, or processing.

DATA (CLASS 709)
Representation of information in a coded manner suitable for communication, interpretation, or processing.

DATA (CLASS 711)
Representation of information in a coded manner suitable for communication, interpretation, or processing. See ADDRESS DATA, INSTRUCTION DATA, STATUS DATA, and USER DATA in this glossary,

DATA (CLASS 712)
Representation of information in a coded manner suitable for communication, interpretation, or processing.

DATA (CLASS 713)
Representation of information in a coded manner suitable for communication, interpretation, or processing.

DATA (CLASS 714)
Representation of information in a coded manner suitable for communication, interpretation, or processing.

DATA (CLASS 718)
A representation of information in a coded manner suitable for communication, interpretation, or processing. Address data: data that represent or identify a source or destination. Instruction data: data that represent an operation and identify its operands, if any. Status data: data that represent conditions of data, digital data processing systems, computers, peripherals, memory, etc. Streamed data: data consisting of a more-or-less continuous series of bits, bytes, or other small, structurally uniform units. User data: data other than address data, instruction data, or status data.

DATA (CLASS 719)
A representation of information in a coded manner suitable for communication, interpretation, or processing.

DATA (CLASS 725)
Any representation of a digital or analog quantity to which meaning has been assigned. A representation of facts, concepts, or instructions, in a manner suitable for communication, interpretation, or processing by humans or by automatic means.

DATA MART (CLASS 707)
Small logical units (subsets) of the larger data warehouse, they typically provide specific access points to portions of the warehouse.

DATA PROCESSING (CLASS 345)
See PROCESSING, below.

DATA PROCESSING (CLASS 701)
For the purpose of this class, data processing is defined as a systematic operation on data in accordance with a set of rules which results in a significant change in the data.

DATA PROCESSING (CLASS 702)
For the purpose of this class, data processing is defined as a systematic operation on data in accordance with a set of rules which results in a significant change in the data.

DATA PROCESSING (CLASS 705)
(For the purpose of this class) A systematic operation on data in accordance with a set of rules which results in a significant change in the data.

DATA PROCESSING (CLASS 706)
See PROCESSING, below

DATA PROCESSING (CLASS 709)
See PROCESSING, below.

DATA PROCESSING (CLASS 711)
See PROCESSING below.

DATA PROCESSING (CLASS 712)
See PROCESSING, below.

DATA PROCESSING (CLASS 713)
See PROCESSING, below.

DATA PROCESSING (CLASS 714)
See PROCESSING, below.

DATA PROCESSING (CLASS 718)
See PROCESSING, below.

DATA PROCESSING (CLASS 719)
See PROCESSING, below.

DATA PROCESSING (for the purpose of this class): (CLASS 700)
A systematic operation on data in accordance with a set of rules which results in a significant change in the data.

DATA STRUCTURE (CLASS 707)
A physical or logical relationship among a set of data elements designed to support specific data manipulation functions in a computerized data processing system.

DATA: (CLASS 700)
Representation of information in a coded manner suitable for communication, interpretation, or processing.

DATABASE (CLASS 707)
A collection of data arranged for ease of storage, retrieval, updating, searching and sorting by computerized means. Storage and organization of data, examples of a database include relational model based, hierarchical, or object oriented.

DATABASE MANAGEMENT SYSTEM (DBMS) (CLASS 707)
A suite of software that is designed to manage the organization, storage and retrieval of data within a database.

DATABASE TRIGGER (CLASS 707)
Trigger is procedural code that is automatically executed in response to certain events on a particular table in a database

DBR (CLASS 438)
distributed Bragg reflector

DCFL (CLASS 438)
direct-coupled FET logic

DCG (CLASS 438)
dichromated gelatin

DCS (CLASS 438)
dichlorosilane

DDE (CLASS 438)
double diffused epitaxy

DDI (CLASS 438)
deep dielectric isolation

DE BROGLIE WAVELENGTH (CLASS 257)
The wavelength of a particle, based on L.V. de Broglie'S theory that particles exhibit wavelike characteristics.

DE BROGLIE WAVELENGTH (CLASS 977)
Wavelength of a particle under quantum mechanical conditions wherein the particle acts as a wave; calculated by a ratio of Planck’s constant to the particle’s momentum.

DEAD-BOLT (CLASS 070)
An unbiased bolt normally at rest, whether or not so held, and movable only by a positively initiated external force.

DEBITEUSE (CLASS 065)
A slotted floating, refractory block through which glass issues in the formation of a glass sheet during a drawing operation.

DECODING (CLASS 506)
Method enabling the determination of the structure of a library member or the reaction sequence leading to its preparation, which method involves "reading" (e.g., determining the structure of, etc.) a surrogate analyte (e.g., code, tag, label, etc.) associated with said library member.

DECONVOLUTION (CLASS 506)
Process of fractionating (normally by resynthesis or by elaborating a partial library) a pool with some level of the desired activity to give a set of smaller pools. See also iterative deconvolution.

DECRYPTING OR DECIPHERING (CLASS 380)
A process of extracting concealed information from an intentionally obscured form and changing it into a form intelligible to a recipient with proper authorization or equipment.

DEEP DEPLETION (CLASS 257)
The condition in which a depletion layer formed in a MOS active device due to voltage applied to the gate electrode of the device, is deeper than the maximum depth at which inversion would normally be expected to occur at room temperature in a semiconductor device at the surface closest to the gate electrode, without formation of an inversion layer.

DEEP DEPLETION (CLASS 438)
The condition in which a depletion layer formed in a MOS active device due to voltage applied to the gate electrode of the device is deeper than the maximum depth at which inversion would normally be expected to occur at room temperature in a semiconductor device at the surface closest to the gate electrode, without formation of an inversion layer.

DEEP GROOVE ISOLATION (CLASS 257)
Electrical isolation of adjacent devices in a single monolithic semiconductor chip by grooves extending deeply into and below the surface of the chip between the devices.

DEEP LEVEL CENTERS (CLASS 438)
Energy levels that can act as traps located in the forbidden band of a semiconductor material that are not near the conduction or valence band edges.

DEEP-LEVEL CENTERS (CLASS 257)
Energy levels that can act as traps located in the forbidden band of a semiconductor material that are not near the conduction or valence band edges.

DEFLECTOR (CLASS 072)
An element of instrumentality which engages successively presented portions of moving work and forces said portions from a first path of motion into a second and different path of motion.

(1) Note. The "Deflector" may comprise a single deflecting surface forcing all portions of work in a single direction, or a plurality of elements acting differently upon different portions of work.

DEFLECTOR (CLASS 239)
A solid means arranged exteriorly of the egress port or last point of confinement for dispersing or redirecting the effluent. Some deflectors may be abrupt continuations of the terminal flow conducting means unitarily formed therewith.

DEFLECTOR (CLASS 366)
(1) An element or device secured within and in fixed relation to the mixing chamber, or (2) a stationary device in a movable mixing chamber for diverting or separating portions of material and then permitting them to recombine so as to commingle, thus causing or assisting in agitation of the material.

DEFORM (CLASS 227)
In this class is used in the sense imparted by the Class Definition and Lines With Other Classes and Within This Class in Class 72.

DEFORMING (CLASS 029)
The physical act of or means for shaping without any substantial removal of material. This term includes forging, rolling, densifying, extruding, drawing and stretching.

DEGENERATION (CLASS 257)
Doping of a semiconductor to such an extent that the Fermi level lies within the conduction band (N+ semiconductor) or within the valence band (P+ semiconductor). Also, in circuit applications, negative feedback between two or more active solid-state devices.

DEGENERATION (CLASS 438)
Doping of a semiconductor to such an extent that the Fermi level lies within the conduction band (i.e., N+ semiconductor) or within the valence band (i.e., P+ semiconductor). Also, in circuit applications, negative feedback between two or more active solid-state devices.

DEGREE OF FREEDOM (CLASS 901)
Each linear or rotary movement along or about a given axis.

DEIS (CLASS 438)
dual electron injection structure

DELAY (CLASS 333)
Includes phase distortion and also includes the retardation of a single pulse with respect to time.

DELAY NETWORK (CLASS 330)
Networks including significant structure for retarding wave energy a predetermined period of time over a range of frequencies.

DELAY NETWORK (CLASS 333)
Networks including significant structure for retarding wave energy a predetermined period of time over a range of frequencies.

DELIVERING (CLASS 271)
Refers to the "means for removing the individual sheet from the operation after having been operated on or placing the individual sheet on a receiver after having been operated on."

DELIVERY (CLASS 725)
The act of sending something, such as motion video data, to an intended destination.

DEMODULATOR (CLASS 329)
A device which extracts an arbitrarily varying modulating signal from an electrical or electromagnetic modulated signal of less than infrared frequency.

DEMOGRAPHICS (CLASS 725)
The statistical characteristics of human populations, such as age or income, used especially to identify markets.

DENDRIMER (CLASS 977)
Artificially manufactured molecule, such as a synthesized polymer, etc.

DENOMINATIONAL-STOP (CLASS 400)
A component of the carriage* mechanism that causes stopping of the carriage in any of selected denominational column positions. In a denominational column a sequence of numerical digits is imprinted on one print-line* and further sequences of numeral digits are imprinted in successive print-lines, one print-line below the previous print-line. The distinguishing characteristic of a denominational column is that the decimal point of successive print-lines of numeral digits is in vertical array, or in the instance where the decimal point of successive numbers is not actually imprinted, the "units" digit of the successive numbers is in vertical array. Thus the position where the carriage will be stopped to imprint each of a succession of numbers will depend on whether the first digit of a sequence of numeral digits is to be a "hundreds" digit, or a "tens" digit, etc. A denominational-stop is usually a "counter stop" (see the discussion under the definition of tab-rack* in this Glossary).

DENSITY FUNCTIONAL THEORY (DFT) (CLASS 977)
Theory explaining and calculating the electronic structure of molecules and solids.

DEPLETION LAYER (CLASS 257)
See DEPLETION REGION.

DEPLETION MODE (CLASS 257)
The operation of a field-effect transistor having appreciable channel conductivity for zero gate- source voltage and whose channel conductivity may be increased or decreased according to the polarity of the applied gate-source voltage, by changing the gate-to-source voltage from zero to a finite value, resulting in a decrease in the magnitude of the drain current.

DEPLETION MODE (CLASS 438)
The operation of a field effect transistor having appreciable channel conductivity for zero gate-source voltage and whose channel conductivity may be increased or decreased according to the polarity of the applied gate-source voltage, by changing the gate-to-source voltage from zero to a finite value, resulting in a decrease in the magnitude of the drain current.

DEPLETION REGION (CLASS 257)
The region extending on both sides of a reverse biased semiconductor junction in which free carriers are removed from the vicinity of the junction. It is also called a space charge region, a barrier region, or an intrinsic semiconductor region.

DEPLETION REGION (CLASS 438)
The region extending on both sides of a reverse biased semiconductor junction in which free carriers are removed from the vicinity of the junction. It is also called a space charge region, a barrier region, or an intrinsic semiconductor region.

DEPOLARIZATION (CLASS 320)
The process of preserving or restoring a primary cell by partially or completely removing its increased resistance (i.e., polarization) as the potential of an electrode changes during electrolysis.

DEPOSITORY (CLASS 402)
An article adapted to include a sheet retainer*, of this class, for the retention of apertured sheets* and intended to receive both (1) the nonthickness surface (See Fig. 1) and (2) the thickness surface (See Fig. 1) of the sheet or either (1) or (2) above.

DEPUTER (CLASS 065)
See debiteuse.

DERIVATIVE (CLASS 435)
For purposes of this class derivatives included with the production of a named compound are only the inorganic anion or inorganic cation salts thereof, e.g., metal, ammonium, halogen, carbonate, etc.

DESALINATION (CLASS 210)
The process of removing inorganic salts, most usually sodium chloride, from water.

DESIGNATED CHEMICAL COMPOSITION (DCC) (CLASS 204)
A composition in which at least one of the chemical atoms can either be deduced with certainty or be determined to belong to a limited select group of elements (as indicated in the exemplary lists of terms provided below); except that for the purposes of this class, "organic" is considered to be too broad, eventhough inherently reciting the presence of a carbon atom. An exemplary list of terms used to describe compositions to be regarded as DCC's is as follows: alcohol, alkali or alkaline earth metal, amine, carbon black, carboxylic acid, chalcogen, drying oil, ether, fat, fatty acid or ester, halogen, hydrocarbon, latex, metal hydrate, peroxide, peroxy-, proton donor, sulfide, water, etc. An exemplary list of terms used to describe compositions not to be regarded as DCC's is as follows: amphoteric, anionic, antioxidant, blue, cationic, cosolvent, conductor, crystalline, curing catalyst, deliquescent, dielectric, dispersant, drier, electrophoretic, emulsifier, fibrous, filler, fluorescent, free radical, gas, humectant, hydrophillic, inorganic compound, insulator, ionic, Lewis acid or base, liquid, lubricant, luminescent, metal containing, mineral, numerically described without designating a chemical atom or a limited select group of elements, organic compound, organic solvent, organometallic, particulate, phosphorescent, pigment, plastic, plasticizer, preservative, solid, solvent, stabilizer, surface active agent, surfactant, wax, Ziegler or Natta catalysts, etc. These lists are not intended to be exhaustive.

DESIGNATED ELEMENTAL NONACTIVE INGREDIENT (CLASS 514)
Denotes an elemental material either metallic or nonmetallic and which is identified by its chemical nature, e.g., iron, silver, etc., or is identified in a generic manner, e.g., alkali metal atom, etc. The term nonactive as used herein denotes the absence of any physiological, pharmacological or biological affect attributed to the elemental material.

DESIGNATED INORGANIC NONACTIVE INGREDIENT (CLASS 514)
Denotes an inorganic compound which is identified by at least one chemical atom, e.g., sodium-containing, etc., or is identified as a generic type of inorganic chemical compound, e.g., alkali metal-containing, etc. The term nonactive as used herein denotes the absence of any physiological, pharmacological or biological affect attributed to the inorganic material.

DESIGNATED NONREACTANT MATERIAL (DNRM) (CLASS 522)
As used in this class, designated nonreactant material (DNRM) is a material wherein at least one of the chemical atoms can be deduced with certainty. For purposes of this class, organic material although inherently reciting the presence of a carbon atom is considered to be too broad. An exemplary list of materials to be regarded as DNRM's is as follows: metal hydrate, chalcogen, carboxylic acid, peroxy, peroxide, latex, alkali or alkaline earth metal, transition metal, halogen, proten donor, sulfiede, drying oil, fat, fatty acid or ester, water, carbon black, etc. This list is by no means limited to the above examples. The following list is not exhaustive and merely enumerates certain materials that will not be considered as DNRM's, e.g., organic compound, metal containing, inorganic compound, organometallic compound, solvent, wax, magnetic, hydrophobic, hydrophillic, antiplasticizer, plasticizer, filler, preservative, antioxidant, antiozonant, stablizer, lubricant, fibrous additive, particulate additive, liquid, solid, gas, dispersant, emulsifier, crystalline, plastic, flourescent, phosphorescent, liminescent, deliquescent, drier, dessicant, humectant, blue color,numerically described without providing a chemical atom, Lewis acid or base, mineral, organic solvent, cosolvent, Ziegler or Natta catalysts, alfin catalyst, free radical, amphoteric, anionic, ionic, denaturant, electrostatic, dielectric, conductor, insulator, etc. This list is to be regarded as illustrative rather than exhaustive.

DESIGNATED ORGANIC ACTIVE INGREDIENT (DOAI) DENOTES (CLASS 514)
(1) The active ingredient is identified by at least one chemical atom, e.g., organic phosphorus compound, etc., or (2) The active ingredient is identified as a generic type of chemical atom, e.g., alcohol, ether, etc. The term active denotes the presence of a physiological, pharmacological or biological affect.

DESIGNATED ORGANIC NONACTIVE INGREDIENT DENOTES (CLASS 514)
(1) A nonactive ingredient is identified by at least one chemical atom or (2) the nonactive ingredient is identified as a generic type of chemical compound, e.g., starch, etc. The term nonactive denotes the absence of any physiological, pharmacological or biological affect attributed to the organic material.

DESTROYING (CLASS 588)
To convert the hazardous or toxic waste to an environmentally safe substance to include the steps used to prepare the waste for destruction as well as the actual destruction.

DESTRUCTIVE DISTILLATION (CLASS 201)
See thermolytic distillation.

DESTRUCTIVE DISTILLATION (CLASS 202)
See thermolytic distillation.

DETECT (CLASS 095)
The term "detect," which is used in many of the control subclasses, is used in both a quantitative and a qualitative sense. This means that a definite measurement of a process variable is made (e.g., temperature, pressure, concentration, etc.) or that the presence of a particular event is determined (e.g., presence of sparking, change in liquid level determined by position of float, etc.).

DETECT (CLASS 096)
The term "detect," which is used in many of the control subclasses, is used in both a quantitative and a qualitative sense. This means that a definite measurement of a process variable is made (e.g., temperature, pressure, concentration, etc.) or that the presence of a particular event is determined (e.g., presence of sparking, change in liquid level determined by position of float, etc.).

DETECTOR (CLASS 083)
A mechanism for sensing a physical property or characteristic of, or the presence or absence or passage of, the work or the product or a movable element of a machine; which mechanism effects a signal or impulse as a result of such sensing. The signal or impulse is sent through a transmitter, (see definition of "transmitter" below) and effects or initiates the functioning of a machine part or assembly controlled by the detector.

DETECTOR (CLASS 250)
A material or device whose response to radiant energy is used to indicate the presence or amount of incident radiation. Also, called "Signalling Means".

DETECTOR (CLASS 378)
A material or device whose response to X-ray energy is used to indicate the presence or amount of incident radiation.

DEVELOPING APPARATUS (CLASS 396)
Developing apparatus is that which makes a photographic image visible.

DEVICE (ACTIVE) (CLASS 257)
The physical realization of an individual electrical element in a physically independent body which cannot be further divided without destroying its stated function. Examples are transistors, pnpn structures, and tunnel diodes.

DEVICE (ACTIVE) (CLASS 438)
The physical realization of an individual electrical element in a physically independent body which cannot be further divided without destroying its stated function. Examples are transistors, pnpn structures, and tunnel diodes.

DEVICE (CLASS 705)
An assemblage of components at a single location or which may have its several components at geographically distinct locations, i.e., a network.

DEVITRIFY (CLASS 065)
The changing of glass in the amorphous state to crystalline state generally by holding a glass melt at a temperature which favors crystal growth.

DEZ (CLASS 438)
diethylzinc

DFB (CLASS 438)
distributed feedback (laser)

DH (CLASS 438)
double-hetero

DHBT (CLASS 438)
double-hetero bipolar transistor

DHF (CLASS 438)
dilute hydrofluoric acid

DI (CLASS 438)
dielectric isolation

DIALING (CLASS 379)
Generating a call address signal. Although a dial is a rotary pulse generating switch, the term dialing is sometimes used generically as in the terms "tone dialing" and "resistance dialing".

DIALYSATE (CLASS 210)
See DIALYSIS.

DIALYSIS (CLASS 210)
A process of separating a dissolved constituent from a liquid by transport or migration from the liquid through a membrane into a second liquid. The membrane may be semipermeable or the second liquid may have greater affinity for the constituent but the net effect of the combined membrane-extracting liquid is to selectively remove a constituent from the first liquid. The process is provided for in subclasses 644+. An in-depth explanation is given in Kirk Othmer Encyclopedia of Chemical Technology 2nd ed. Vol. 7, pp. 1-20. Dialysate is the product of a dialysis method and the term is not always used for the same product, including retentate and diffusate.

DIAPHRAGM (CLASS 396)
A diaphragm is a device to change the light flux passing through the aperture.

DIASPORE (CLASS 117)
Al2O3.H2O; a natural hydrous aluminum oxide; HAlO2.

DIASTACE (CLASS 435)
For purposes of this class classified as an amylase.

DIBL (CLASS 438)
drain induced barrier lowering

DICHROIC (CLASS 359)
As used in one sense, the term dichroic refers to (1) the property of some materials to absorb to a greater degree one or the other of the two orthogonal component vectors which can be considered as constituting ordinary light. This results in producing light polarized to a degree depending upon the relative absorption of the two components. The term dichroic is also used to refer to (2) an optical element which will transmit light of one color and reflect other colors with little light being absorbed. These elements are usually composed of superimposed strata of dielectric materials.

DIE (CLASS 072)
A metal-deforming tool* which, as disclosed, has a shaping or reshaping function with regard to the portion(s) of work engaged by it.

(1) Note. For the purposes of this class, a "Die" may be regarded as a tool which leaves or impresses its characteristic mark on the engaged face portion of work. The mark may be a three-dimensional imprint of the die face (see "Tool Face"), or may simply be the trace or track left by passage of the "Die" while in forcible engagement with the work, with or without accompanying deformation in other portions of the work. If the tool-engaged face of the work remains unaltered in shape or position, the tool is regarded as an anvil*; if altered in position only, the tool in question is a work-forcer*. See "Anvil", "Closed Die". "Tool", and "Work- Forcer".

DIE (CLASS 257)
A tiny piece of semiconductor material, separated from a semiconductor slice, on which one or more active electronic components are formed. Sometimes called a chip.

DIE (CLASS 425)
An apparatus part having a work contacting part for shaping or reshaping the work.

DIE (CLASS 438)
A tiny piece of semiconductor material, separated from a semiconductor slice, on which one or more active electronic components are formed. Sometimes called a chip.

DIE BOND (CLASS 257)
Attachment of a semiconductor chip to a substrate or chip carrier or package, usually with an epoxy, eutectic, or solder alloy.

DIE BOND (CLASS 438)
Attachment of a semiconductor chip to a substrate or chip carrier or package, usually with an epoxy, eutectic, or solder alloy.

DIET (CLASS 438)
dielectrically encapsulated trench capacitor

DIFFERENTIAL TRANSMISSION (CLASS 475)
Mechanism having separate outputs driven simultaneously from a different member of a planetary gear transmission; the arrangement being such that a change in speed of one of the outputs, in at least one mode of operation, has a direct effect on the speed of the other output.

DIFFRACTION (CLASS 356)
The bending of a light ray in passing the edge formed by contiguous opaque and transparent edges.

DIFFRACTION (CLASS 359)
A phenomenon resulting from the wave nature of light, e.g., light passing through a slit of decreasing width, forms a narrower and narrower beam until the slit width approaches the wavelength of light, after which further decreasing of the slit width results in a beam having a larger and larger divergence.

DIFFRACTION (CLASS 372)
The bending of a light ray in passing the edge formed by contiguous opaque and transparent areas.

DIFFRACTION PATTERN (CLASS 359)
The intensity profile of a light beam after having passed by a diffracting aperture or object.

DIFFUSATE (CLASS 210)
The material passed through in a diffusing process.

DIFFUSE (CLASS 210)
The passing of a constituent through a membrane or septum.

DIFFUSE (CLASS 356)
Pertaining to the scattering or random deviation of transmitted or reflected light.

DIFFUSE (CLASS 359)
Pertaining to the scattering or random deviation of transmitted or reflected light.

DIFFUSED JUNCTION (CLASS 257)
A junction between two different conductivity regions within a semiconductor and which is formed by diffusion of appropriate impurity atoms into the material.

DIFFUSED JUNCTION (CLASS 438)
A junction between two different conductivity regions within a semiconductor and which is formed by diffusion of appropriate impurity atoms into the material.

DIFFUSED TRANSISTOR (CLASS 257)
A transistor in which the emitter and collector junctions are formed by diffusion of dopant atoms into the semiconductor material.

DIFFUSION (CLASS 257)
(1) The movement of carriers from a region of concentration to one of lower concentration; (2) a process of adding impurities to a semiconductor material to change its electrical characteristics.

DIFFUSION BARRIER (CLASS 257)
An obstacle to the diffusion of charge carriers in an active solid-state device.

DIFFUSION BARRIER (CLASS 438)
An obstacle to the diffusion of atoms in a metallization scheme for an active solid-state device.

DIFFUSION CURRENT (CLASS 257)
Current caused by charge carriers diffusing from a volume of high carrier concentration to a volume of lower carrier concentration in a solid-state material.

DIFFUSION LENGTH (CLASS 257)
In a homogeneous semiconductor material, the average distance minority carriers move during their lifetime (i.e., between generation and recombination).

DIGEST (CLASS 210)
Process in which material is acted upon by micro-organisms to cause a chemical change. The composting of sludge is a digestion process.

DIGGERS (CLASS 171)
Devices which are forced into a mass of earth and are then raised to lift an object disposed in said earth and/or to lift portions of the earth itself with objects embedded therein.

DIGITAL (CLASS 375)
Of or pertaining to the class of devices or circuits in which the output varies in discrete steps (i.e., pulses or "on-off" operation).

DIGITAL (CLASS 388)
Of or pertaining to the general class of devices or circuits in which the output varies in discrete steps (cf., "analog" above).

DIGITAL CIRCUIT (CLASS 326)
A circuit which operates at two or more discrete well­defined logic levels or states, in the manner of a switch, such as either "on" or "off" or "high" or "low" (i.e., high voltage or low voltage).

DIGITAL CONTROL (CLASS 388)
A control circuit utilizing digital, as opposed to analog, signals.

DIGITAL DATA PROCESSING SYSTEM (CLASS 345)
An arrangement of processor(s) in combination with either memory or peripherals, or both, performing data processing.

DIGITAL DATA PROCESSING SYSTEM (CLASS 707)
An arrangement of processor(s) in combination with either memory or peripherals, or both, performing data processing.

DIGITAL DATA PROCESSING SYSTEM (CLASS 709)
An arrangement of processor(s) in combination with either memory or peripherals, or both, performing data processing.

DIGITAL DATA PROCESSING SYSTEM (CLASS 711)
An arrangement of processor(s) in combination with either memory or peripherals, or both, performing data processing.

DIGITAL DATA PROCESSING SYSTEM (CLASS 712)
An arrangement of processor(s) in combination with either memory or peripherals, or both, performing data processing.

DIGITAL DATA PROCESSING SYSTEM (CLASS 713)
An arrangement of processor(s) in combination with either memory or peripherals, or both, performing data processing.

DIGITAL DATA PROCESSING SYSTEM (CLASS 714)
An arrangement of processor(s) in combination with either memory or peripherals, or both, performing data processing.

digital data processing system (CLASS 718)
An arrangement of processor(s) in combination with either memory or peripherals, or both, performing data processing.

DIGITAL DATA PROCESSING SYSTEM (CLASS 719)
An arrangement of processor(s) in combination with either memory or peripherals, or both, performing data processing.

DIGITAL SIGNAL (CLASS 326)
An electrical signal with discrete, well-defined logic levels or states. Digital normally means binary or two-state.

| A | B | C-CL | CM-CZ | D-DIM | DIM-DZ | E | F | G | H | I | J-K | L | M-MET | MET-MZ | N | O | P-PHA | PHE-PON | POR-PZ | Q | R | S-SEPA | SEPO-SMT | SN-STEM | STEP-SZ | T-TOG | TON-TZ | U | V | W | X-Z |

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