Title:
ANALOG-TO-DIGITAL CONVERTER MADE WITH FOCUSED ION BEAM TECHNOLOGY
Document Type and Number:
WIPO Patent Application WO1989007367
Kind Code:
A3
Abstract:
An analog-to-digital converter 10 employs a series of comparators 12, 14, 16 and 18. Each comparator includes at least one inverter consisting of a CMOS transistor pair including a P-channel transistor 22 and N-channel transistor 24. The threshold levels of the transistors 22, 24 are modified using focused ion beam implantation techniques to provide the comparators with monotonically increasing transistion levels.
Inventors:
LARSON LAWRENCE E (US)
JENSEN JOSEPH F (US)
WALDEN ROBERT H (US)
SCHMITZ ADELE E (US)
JENSEN JOSEPH F (US)
WALDEN ROBERT H (US)
SCHMITZ ADELE E (US)
Application Number:
PCT/US1988/004693
Publication Date:
October 05, 1989
Filing Date:
December 23, 1988
Export Citation:
Assignee:
HUGHES AIRCRAFT CO (US)
International Classes:
H01L27/12; H01L29/06; H01L21/265; H01L29/78; H01L29/786; H03M1/00; H03M1/36; (IPC1-7): H03M1/36; H01L29/78
Foreign References:
| GB2021346A | 1979-11-28 | |||
| US4420743A | 1983-12-13 |
Other References:
See also references of EP 0353271A1
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