Patent US5341267A successfully refreshed from Google Patents.
US5341267A
Expired / Lapsed
US
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Structures for electrostatic discharge protection of electrical and other components
Assignee: Mentor Graphics Corp
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Filing: 1991-09-23
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Granted: 1994-08-23
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Expires: 2011-09-23
Abstract
Abstract A first passive ESD protection device for an electronic component in a microcircuit includes a fuse element shunting the component to be protected and includes a passive programming path from the outside of the microcircuit to the fuse element. A second passive ESD protection device is deactivatable and reactivatable and includes a first fuse element shunted by a second fuse element in series with a first antifuse element. Shunting the second fuse element with a third fuse element in series with a second antifuse element permits a second deactivation and reactivation to be performed. Additional deactivation/reactivation cycles may be permitted by providing additional series combinations of fuse elements and antifuse elements shunting the preceding fuse element. Combinations of the passive protection device and dual elements comprise ESD protection schemes which may be deactivated and activated multiple times.
Inventors
- 👤 Ralph G. Whitten
- 👤 Ta-Pen Guo
- 👤 Amr Mohsen
- 👤 Alan E. Comer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:58
CPC Classifications
H; H10; H10W; H10W42/00; H10W42/60
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
73 words
A deactivatable, reactivatable, ESD protection device for preventing damage to at least one electrical component connected directly or indirectly between a first circuit node and a second circuit node, comprising: a first fuse element connected between said first circuit node and said second circuit node; a first dual element connected in parallel with said first fuse element, said first dual element comprising a second fuse element in series with a first antifuse element.
Claim 2
Dependent Claim
73 words
A deactivatable, reactivatable, ESD protection device for preventing damage to at least one electrical component connected directly or indirectly between a first circuit node and a second circuit node, comprising: a first fuse element connected between said first circuit node and said second circuit node; a first dual element connected in parallel with said first fuse element, said first dual element comprising a second fuse element in series with a first antifuse element.
Claim 3
Dependent Claim
37 words
The ESD protection device of claim 1, further including a second dual element connected in parallel with said second fuse element, said second dual element comprising a third fuse element in series with a second antifuse element.
Claim 4
Dependent Claim
162 words
An electrically deactivatable ESD protection circuit for at least one component, comprising: at least one first conductor; at least one second conductor forming at least one intersection with said at least one first conductors; at least one component connected between said at least one said first and said at least one second conductors at said at least one intersection, said at least one component susceptible to ESD damage; a first additional conductor connected to a first external node; a second additional conductor connected to a second external node; a first ESD protection element connected between said first additional conductor and said at least one said first conductor; a second ESD protection element connected between said second additional conductor and said at least one second conductor; a third external node; a third ESD protection element connected between said first additional conductor and said third external node; and a fourth ESD protection element connected between said second additional conductor and said third external node.
Claim 5
Dependent Claim
162 words
An electrically deactivatable ESD protection circuit for at least one component, comprising: at least one first conductor; at least one second conductor forming at least one intersection with said at least one first conductors; at least one component connected between said at least one said first and said at least one second conductors at said at least one intersection, said at least one component susceptible to ESD damage; a first additional conductor connected to a first external node; a second additional conductor connected to a second external node; a first ESD protection element connected between said first additional conductor and said at least one said first conductor; a second ESD protection element connected between said second additional conductor and said at least one second conductor; a third external node; a third ESD protection element connected between said first additional conductor and said third external node; and a fourth ESD protection element connected between said second additional conductor and said third external node.
Claim 6
Dependent Claim
21 words
The ESD protection circuit of claim 3 wherein said first, second, third, and fourth ESD protection elements include a fuse element.
Claim 7
Dependent Claim
51 words
The ESD protection circuit of claim 3 wherein said first, second, third, and fourth ESD protection elements include a first fuse element and a first dual element connected in parallel with said first fuse element, said first dual element comprising a second fuse element in series with a first antifuse element.
Claim 8
Dependent Claim
79 words
The ESD protection circuit of claim 3 wherein said first, second, third, and fourth ESD protection elements include a first fuse element, a first dual element connected in parallel with said first fuse element, said first dual element comprising a second fuse element in series with a first antifuse element, and a second dual element connected in parallel with said second fuse element, said second dual element comprising a third fuse element in series with a second antifuse element.
Claim 9
Dependent Claim
88 words
The ESD protection circuit of claim 3, further including: a first resistor connected between said third ESD protection device and said first additional conductor; a second resistor connected between said fourth ESD protection device and said second additional conductor; a fourth external circuit node connected to a circuit node comprising the common connection of said third ESD protection device and said first resistor; and a fifth external circuit node connected to a circuit node comprising the common connection of said fourth ESD protection device and said second resistor.
Claim 10
Dependent Claim
21 words
The ESD protection circuit of claim 7 wherein said first, second, third, and fourth ESD protection elements include a fuse element.
Claim 11
Dependent Claim
51 words
The ESD protection circuit of claim 7 wherein said first, second, third, and fourth ESD protection elements include a first fuse element and a first dual element connected in parallel with said first fuse element, said first dual element comprising a second fuse element in series with a first antifuse element.
Claim 12
Dependent Claim
79 words
The ESD protection circuit of claim 7 wherein said first, second, third, and fourth ESD protection elements include a first fuse element, a first dual element connected in parallel with said first fuse element, said first dual element comprising a second fuse element in series with a first antifuse element, and a second dual element connected in parallel with said second fuse element, said second dual element comprising a third fuse element in series with a second antifuse element.
Claim 13
Dependent Claim
16 words
The ESD protection circuit of claim 7 wherein said at least one component is an antifuse.
Claim 14
Dependent Claim
273 words
An Electrically deactivatable ESD protection circuit for a component, comprising: at least one first conductor; at least one second conductor forming at least one intersection with said at least one first conductor; at least one component connected between said at least one first and said at least one second conductors at said at least one intersection, said at least one component susceptible to ESD damage; a first additional conductor connected to a first external node; a second additional conductor connected to a second external node; a third additional conductor connected to a third external node; a fourth additional conductor connected to a fourth external node; at least one first ESD protection element connected between said first additional conductor and a first end of said at least one first conductor; at least one second ESD protection element connected between said second additional conductor and a first end of said at least one second conductor; at least one third ESD protection element connected between said third additional conductor and a second end of said at least one first conductor; at least one fourth ESD protection elements connected between said fourth additional conductor and a second end of said at least one second conductor; a fifth external node; a fifth ESD protection element connected between said first additional conductor and said fifth external node; a sixth ESD protection element connected between said second additional conductor and said fifth external node; a sixth external node; a seventh ESD protection element connected between said third additional conductor and said sixth external node; a eighth ESD protection element connected between said fourth additional conductor and said sixth external node.
Claim 15
Dependent Claim
273 words
An Electrically deactivatable ESD protection circuit for a component, comprising: at least one first conductor; at least one second conductor forming at least one intersection with said at least one first conductor; at least one component connected between said at least one first and said at least one second conductors at said at least one intersection, said at least one component susceptible to ESD damage; a first additional conductor connected to a first external node; a second additional conductor connected to a second external node; a third additional conductor connected to a third external node; a fourth additional conductor connected to a fourth external node; at least one first ESD protection element connected between said first additional conductor and a first end of said at least one first conductor; at least one second ESD protection element connected between said second additional conductor and a first end of said at least one second conductor; at least one third ESD protection element connected between said third additional conductor and a second end of said at least one first conductor; at least one fourth ESD protection elements connected between said fourth additional conductor and a second end of said at least one second conductor; a fifth external node; a fifth ESD protection element connected between said first additional conductor and said fifth external node; a sixth ESD protection element connected between said second additional conductor and said fifth external node; a sixth external node; a seventh ESD protection element connected between said third additional conductor and said sixth external node; a eighth ESD protection element connected between said fourth additional conductor and said sixth external node.
Claim 16
Dependent Claim
75 words
The ESD protection circuit of claim 12 wherein said first, second, fifth, and sixth ESD protection elements comprise a first fuse element and a first dual element connected in parallel with said first fuse element, said first dual element comprising a second fuse element in series with a first antifuse element, and said third, fourth, seventh, and eighth ESD protection elements comprise a dual element comprising a fuse element in series with an antifuse element.
Claim 17
Dependent Claim
166 words
The ESD protection circuit of claim 12, further including: a first resistor connected between said fifth ESD protection device and said first additional conductor; a second resistor connected between said sixth ESD protection device and said second additional conductor; a seventh external circuit node connected to a circuit node comprising the common connection of said fifth ESD protection device and said first resistor; a eighth external circuit node connected to a circuit node comprising the common connection of said sixth ESD protection device and said second resistor; a third resistor connected between said seventh ESD protection device and said third additional conductor; a fourth resistor connected between said eighth ESD protection device and said fourth additional conductor; a seventh external circuit node connected to a circuit node comprising the common connection of said seventh ESD protection device and said third resistor; and a eighth external circuit node connected to a circuit node comprising the common connection of said eighth ESD protection device and said fourth resistor.
Claim 18
Dependent Claim
75 words
The ESD protection circuit of claim 14 wherein said first, second, fifth, and sixth ESD protection elements comprise a first fuse element and a first dual element connected in parallel with said first fuse element, said first dual element comprising a second fuse element in series with a first antifuse element, and said third, fourth, seventh, and eighth ESD protection elements comprise a dual element comprising a fuse element in series with an antifuse element.
Claim 19
Dependent Claim
16 words
The ESD protection circuit of claim 12 wherein said at least one component is an antifuse.
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) | 1997-08-22 | 1998-02-21 | 1998-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-22 | 2002-02-21 | 2002-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-22 | 2006-02-21 | 2006-08-23 | $7700.00 | Window Closed / Lapsed |