US PATENT SUBCLASS 438 / 542
.~ Diffusing a dopant


Current as of: June, 1999
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438 /   HD   SEMICONDUCTOR DEVICE MANUFACTURING: PROCESS

510  DF  INTRODUCTION OF CONDUCTIVITY MODIFYING DOPANT INTO SEMICONDUCTIVE MATERIAL {7}
542.~ Diffusing a dopant {15}
543  DF  .~.~> To control carrier lifetime (i.e., deep level dopant)
544  DF  .~.~> To solid-state solubility concentration
545  DF  .~.~> Forming partially overlapping regions
546  DF  .~.~> Plural dopants in same region (e.g., through same mask opening, etc.) {1}
548  DF  .~.~> Plural dopants simultaneously in plural regions
549  DF  .~.~> Single dopant forming plural diverse regions (e.g., forming regions of different concentrations or of different depths, etc.)
550  DF  .~.~> Nonuniform heating
551  DF  .~.~> Using multiple layered mask {1}
553  DF  .~.~> Using metal mask
554  DF  .~.~> Outwardly
555  DF  .~.~> Laterally under mask opening
556  DF  .~.~> Edge diffusion by using edge portion of structure other than masking layer to mask
557  DF  .~.~> From melt
558  DF  .~.~> From solid dopant source in contact with semiconductor region {6}
565  DF  .~.~> From vapor phase {3}


DEFINITION

Classification: 438/542

Diffusing a dopant:

(under subclass 510) Processes for permeating an electrically active impurity in a semiconductive region of the substrate.