US5568436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor device and method of screening the same
Assignee: Toshiba Corp
•
Filing: 1995-06-07
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Granted: 1996-10-22
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Expires: 2015-06-07
Abstract
Abstract A semiconductor device comprising a plurality of circuit blocks to which various potentials, including at least one potential either raised or lowered, are assigned. The device further comprises means for selectively and reversely changing the potentials assigned to the circuit blocks.
Inventors
- 👤 Tohru Furuyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:52
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/21; G11C11/34; G11C11/40; G11C11/401; G11C11/4063; G11C11/407; G11C11/408; G11C11/4085; G11C29/00; G11C29/04; G11C29/08; G11C29/12; G11C29/46; G11C29/50; G11C5/00; G11C5/14; G11C5/145; G11C5/147
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
89 words
A method of screening a semiconductor device which comprises a plurality of circuit blocks to which various potentials, including at least one potential either raised or lowered, are assigned, and means for selectively and reversibly changing the potentials assigned to said circuit blocks, said method comprising the step of: selectively and reversibly changing the potentials assigned to the circuit blocks, thereby to apply a specific voltage to at least one of the circuit blocks, said specific voltage being not higher than the voltages applied to the other circuit blocks.
Claim 2
Independent Claim
89 words
A method of screening a semiconductor device which comprises a plurality of circuit blocks to which various potentials, including at least one potential either raised or lowered, are assigned, and means for selectively and reversibly changing the potentials assigned to said circuit blocks, said method comprising the step of: selectively and reversibly changing the potentials assigned to the circuit blocks, thereby to apply a specific voltage to at least one of the circuit blocks, said specific voltage being not higher than the voltages applied to the other circuit blocks.
Claim 3
Dependent Claim
56 words
The method according to claim 1, wherein the potentials assigned to the circuit blocks are selectively and reversibly changed, such that a specific voltage is applied to at least one of the circuit blocks, which is not higher than the voltages applied to the other circuit blocks, when said semiconductor device is still on a waver.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-10-22 | 2000-04-22 | 2000-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-10-22 | 2004-04-22 | 2004-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-10-22 | 2008-04-22 | 2008-10-22 | $7700.00 | Window Closed / Lapsed |