Illumination – Machinery lighting – Cleaning
Patent
1988-12-20
1990-01-23
Pellinen, A. D.
Illumination
Machinery lighting
Cleaning
361 56, 357 2313, 357 51, H02H 904
Patent
active
048962430
ABSTRACT:
An efficient ESD protection circuit is provided having a resistor (18) disposed between an input pin (12) and the functioning circuitry (22) of an integrated circuit package. A primary switching device (28) is electrically connected between the input pin (12) and a reference voltage pin (14). The resistor (18) comprises an N- well (48) formed within the P- substrate (44) and an N+ diffused reion (50) formed within the N- well (48). A silicided layer (52) is formed over the N+ region (50). The primary switching device (28) is constructed to share the same PN junction (54) utilized by the resistor (18). In constructing the primary switching device (28), a P+ region (70) is formed within the N- well (48). Further, an N+ region (68) is formed within the P- substrate (44). Thus, the primary switching device (40) includes three PN junctions (72, 54, 74) which will conduct at a time prior to, or contemporaneous with, the breakdown of resistor (18).
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Chatterjee Amitava
Duvvury Charvaka
Anderson Rodney M.
Pellinen A. D.
Sharp Melvin
Texas Instruments Incorporated
Williams H. L.
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