Inventor
FOELL HELMUT
DE15 patents
⚠️ This page may combine multiple inventors who share the name “FOELL HELMUT”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SIEMENS AG
11 patentsUS4874484AOct 17, 1989
Etching method for generating apertured openings or trenches in layers or substrates composed of n-doped silicon
SIEMENS AG90 citations96
US4563976AJan 14, 1986
Device for manufacturing large-surface, tape-shaped silicon bodies for solar cells
SIEMENS AG31 citations92
US5128514AJul 7, 1992
Black radiator for use as an emitter in calibratable gas sensors
SIEMENS AG18 citations82
US5209833AMay 11, 1993
Method and apparatus for large-area electrical contacting of a semiconductor crystal body with the assistance of electrolytes
SIEMENS AG13 citations73
US4841239AJun 20, 1989
Method and measuring instrument for identifying the diffusion length of the minority charge carriers for non-destructive detection of flaws and impurities in semiconductor crystal bodies
SIEMENS AG17 citations73
US4481235ANov 6, 1984
Apparatus and method for manufacturing tape-shaped silicon bodies for solar cells
SIEMENS AG15 citations68
US4557793ADec 10, 1985
Method and apparatus for drawing crystalline bodies from a melt
SIEMENS AG3 citations63
US5130643AJul 14, 1992
Method for determining the recombination rate of minority carriers at boundary surfaces between semiconductors and other substances
SIEMENS AG5 citations62
US5010294AApr 23, 1991
Method for topically-resolved determination of the diffusion length of minority charge carriers in a semiconductor crystal body with the assistance of an electrolytic cell
SIEMENS AG5 citations62
US4533428AAug 6, 1985
Method and device for asymmetrically coating a tape-shaped carrier body with silicon for further processing into solar cells
SIEMENS AG6 citations62
US4505221AMar 19, 1985
Device for asymmetrically coating a tape-shaped carrier body with silicon for further processing into solar cells
SIEMENS AG6 citations62