US PATENT SUBCLASS 438 / FOR 148
THERMOMIGRATION (437/14)


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



438 /   HD   SEMICONDUCTOR DEVICE MANUFACTURING: PROCESS

FOR 148THERMOMIGRATION (437/14)


DEFINITION

Classification: 438/FOR.148

THERMOMIGRATION:

Foreign art collection for subject matter wherein impurities are diffused in a substrate under a temperature gradient which causes impurities to diffuse toward the hotter end.