SIGNETICS CORPORATION

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6395582 Methods for forming ground vias in semiconductor packagesExpiredOct 19, 99May 28, 02[H01L]
6373131 TBGA semiconductor packageExpiredDec 10, 99Apr 16, 02[H01L]
6323065 Methods for manufacturing ball grid array assembly semiconductor packagesExpiredMay 25, 00Nov 27, 01[H01K]
4937657 Self-aligned metallization for semiconductor device and process using selectively deposited tungstenExpiredDec 08, 88Jun 26, 90[H01L]
4896333 Circuit for generating a trapezoidal current waveform with matched rise and fall timesExpiredAug 04, 87Jan 23, 90[H04L, H04B]
4878181 Video display controller for expanding monochrome data to programmable foreground and background color image dataExpiredNov 13, 87Oct 31, 89[G06F]
4868628 CMOS RAM with merged bipolar transistorExpiredAug 22, 84Sep 19, 89[H01L]
4855622 TTL compatible switching circuit having controlled ramp outputExpiredDec 18, 87Aug 08, 89[H03K]
4849659 Emitter-coupled logic circuit with three-state capabilityExpiredDec 15, 87Jul 18, 89[H03K]
4825108 Voltage translator with restricted output voltage swingExpiredJun 15, 87Apr 25, 89[H03K]
4822749 Self-aligned metallization for semiconductor device and process using selectively deposited tungstenExpiredAug 27, 87Apr 18, 89[H01L]
4816879 Schottky-type rectifier having controllable barrier heightExpiredDec 08, 82Mar 28, 89[H01L]
4808846 Bridge-to-frequency converterExpiredSep 12, 86Feb 28, 89[H03K, H03L]
4804870 Non-inverting, low power, high speed bootstrapped bufferExpiredJan 26, 88Feb 14, 89[H03K]
4803173 Method of fabrication of semiconductor device having a planar configurationExpiredJun 29, 87Feb 07, 89[H01L]
4789646 Method for selective surface treatment of semiconductor structuresExpiredJul 20, 87Dec 06, 88[H01L]
4786609 Method of fabricating field-effect transistor utilizing improved gate sidewall spacersExpiredOct 05, 87Nov 22, 88[H01L]
4783763 Field-programmable device with buffer between programmable circuitExpiredDec 23, 85Nov 08, 88[G11C]
4782462 Raster scan video controller with programmable prioritized sharing of display memory between update and display processes and programmable memory access terminationExpiredDec 30, 85Nov 01, 88[G06F]
4777391 Bipolar multiplexer having a select buffer circuit with a charging and discharging circuitExpiredJul 17, 87Oct 11, 88[H03K]

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