US5467304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor integrated circuit
Assignee: PS4 Luxco SARL
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Filing: 1994-11-14
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Granted: 1995-11-14
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Expires: 2014-11-14
Abstract
Abstract A semiconductor integrated circuit has an identification code indicative of the classification of the product given at or after an assembling process. The semiconductor integrated circuit also includes a identification code outputting portion for outputting the identification code corresponding to an input signal set and input after assembling.
Inventors
- 👤 Katsunori Uchida
- 👤 Shotaro Kobayashi
- 👤 Tatsuhiro Fukushima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:33
CPC Classifications
H; H10; H10W; H10W46/00; H10W46/401; H10W46/403; H10W72/00; H10W72/90
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
67 words
A semiconductor integrated circuit comprising: a plurality of bonding pads, each bonding pad being supplied with a voltage for setting an identification code indicative of a kind of said semiconductor integrated circuit, judgement means for making a judgement for a combination pattern of voltage levels of said bonding pads, and holding means for holding a result of said judgement by said judgement means as said identification code.
Claim 2
Dependent Claim
67 words
A semiconductor integrated circuit comprising: a plurality of bonding pads, each bonding pad being supplied with a voltage for setting an identification code indicative of a kind of said semiconductor integrated circuit, judgement means for making a judgement for a combination pattern of voltage levels of said bonding pads, and holding means for holding a result of said judgement by said judgement means as said identification code.
Claim 3
Dependent Claim
32 words
A semiconductor integrated circuit as set forth in claim 1, wherein each of said bonding pads is bonded to a predetermined voltage line corresponding to said kind of said semiconductor integrated circuit.
Claim 4
Dependent Claim
29 words
A semiconductor integrated circuit as set forth in claim 2, wherein said judgement means comprises a decoder for decoding said combination pattern of voltage levels of said bonding pads.
Claim 5
Dependent Claim
56 words
A semiconductor integrated circuit as set forth in claim 3, further comprising: a plurality of pull-up means for pulling-up potentials of said bonding pads to a power source voltage, respectively, and a plurality of bonding lines for connecting selectively said bonding pads to the ground voltage line, corresponding to said kind of said semiconductor integrated circuit.
Claim 6
Dependent Claim
42 words
A semiconductor integrated circuit as set forth in claim 4, wherein said holding means includes a shift register comprising a plurality of flip-flop elements and said flip-flop elements hold said result of said judgement by said judgement means as said identification code.
Claim 7
Dependent Claim
24 words
A semiconductor integrated circuit as set forth in claim 5, wherein a content of said shift register is read out by a shifting operation.
Claim 8
Dependent Claim
135 words
A semiconductor integrated circuit comprises: a voltage generator circuit for generating N voltages, N being an integer larger than 1, for setting an identification code indicative of a kind of said semiconductor integrated circuit, said voltage generator circuit having N voltage output terminals corresponding to said voltages, pull-up fuses connected between said voltage output terminals and a power supply voltage, respectively, and pull-down fuses connected between said voltage output terminals and a reference voltage, respectively, said fuses being selectively cut corresponding to said kind of said semiconductor integrated circuit, judgement means for making a judgement for a combination pattern in number of 2 N of said voltages at said voltage output terminals, and holding means for holding a result of said judgement in number of 2 N by said judgement means as said identification code.
Claim 9
Dependent Claim
135 words
A semiconductor integrated circuit comprises: a voltage generator circuit for generating N voltages, N being an integer larger than 1, for setting an identification code indicative of a kind of said semiconductor integrated circuit, said voltage generator circuit having N voltage output terminals corresponding to said voltages, pull-up fuses connected between said voltage output terminals and a power supply voltage, respectively, and pull-down fuses connected between said voltage output terminals and a reference voltage, respectively, said fuses being selectively cut corresponding to said kind of said semiconductor integrated circuit, judgement means for making a judgement for a combination pattern in number of 2 N of said voltages at said voltage output terminals, and holding means for holding a result of said judgement in number of 2 N by said judgement means as said identification code.
Claim 10
Dependent Claim
31 words
A semiconductor integrated circuit as set forth in claim 7, wherein said judgement means comprises a decoder for decoding said combination pattern of said voltages generated at said voltage output terminals.
Claim 11
Dependent Claim
44 words
A semiconductor integrated circuit as set forth in claim 8, wherein said holding means includes a shift register comprising a plurality of flip-flop elements and said plurality of flip-flop elements hold said result of said judgement by said judgement means as said identification code.
Claim 12
Dependent Claim
24 words
A semiconductor integrated circuit as set forth in claim 9, wherein a content of said shift register is read out by a shifting operation.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-11-13 | 1999-05-15 | 1999-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-11-13 | 2003-05-15 | 2003-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-11-13 | 2007-05-15 | 2007-11-14 | $7700.00 | Window Closed / Lapsed |