US PATENT SUBCLASS 219 / 121.19
.~.~.~.~ Etching or trimming
Current as of:
June, 1999
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219 /
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ELECTRIC HEATING
50
DF
METAL HEATING (E.G., RESISTANCE HEATING)
{19}
121.11
DF
.~ By arc {16}
121.12
DF
.~.~ Using electron beam {12}
121.18
DF
.~.~.~ Cutting {1}
121.19
.~.~.~.~ Etching or trimming {1}
121.2
DF
.~.~.~.~.~
> Methods
DEFINITION
Classification: 219/121.19
Etching or trimming:
(under subclass 121.18) Subject matter wherein the cut is superficial or partially through the workpiece.
SEE OR SEARCH CLASS
216, Etching a Substrate: Processes,
63, and 94 for the use of an election beam in etching.
438, Semiconductor Device Manufacturing: Process, particularly
661, for combined processes for trimming a conductive pathway on a semiconductive substrate.