Patent US4388525A successfully refreshed from Google Patents.
US4388525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precision optical spacers for image sensor filters
Assignee: CLOSERAY Ltd
•
Filing: 1981-02-11
•
Granted: 1983-06-14
•
Expires: 2001-02-11
Abstract
Abstract A process is described for fabricating spacers of a desired thickness of filters, the spacers to be used in separating the filter from an underlying image sensing device. The process includes the steps of forming a pattern of electrically conductive material on one surface of the filter, depositing dry resist to the desired thickness over all of the filter except on the electrically conductive pattern, depositing additional electrically conductive material on at least the electrically conductive pattern, and removing the dry resist.
Inventors
- 👤 William S. Phy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:27
CPC Classifications
H; H10; H10F; H10F77/00; H10F77/30; H10F77/306; H10F77/331
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
40 words
A structure comprising an image sensing device containing bonding pads; a filter; an electrically conductive pattern on the filter separating the filter from the image sensing device, the pattern disposed on the filter not in contact with the bonding pads.
Claim 2
Dependent Claim
40 words
A structure comprising an image sensing device containing bonding pads; a filter; an electrically conductive pattern on the filter separating the filter from the image sensing device, the pattern disposed on the filter not in contact with the bonding pads.
Claim 3
Dependent Claim
16 words
A structure as in claim 1 wherein the image sensing device is a charge coupled device.
Claim 4
Dependent Claim
13 words
A structure as in claim 2 wherein the filter is an optical filter.
Claim 5
Dependent Claim
13 words
A structure as in claim 1 wherein the electrically conductive pattern comprises chromium.
References Cited (Backward Citations)
US4363963A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-13 | 1986-12-13 | 1987-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-13 | 1990-12-13 | 1991-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-13 | 1994-12-13 | 1995-06-14 | $7700.00 | Window Closed / Lapsed |