Patent US5678544A successfully refreshed from Google Patents.
US5678544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable pulse oximeter sensor
Assignee: Nellcor Puritan Bennett LLC
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Filing: 1995-08-15
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Granted: 1997-10-21
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Expires: 2015-08-15
Abstract
Abstract A conformable sensor which uses a flexible substrate, preferably a polyester strip is disclosed. The emitter and detector are mounted on one portion of the strip with conductive traces connecting to them. The second portion of the strip is folded over to cover the emitter and detector and traces, with openings for the emitter and detector. A conductive coating is applied to the strip to provide shielding from electromagnetic interference. Preferably, a second portion of the strip, which folds over the first portion, also has a Faraday shield covering the opening over the detector. The detector and emitter semiconductor chip die (rather than use encapsulated chips) may be mounted directly on the polyester strip so that it is in contact with one of the conductive traces.
Inventors
- 👤 Russell Delonzor
- 👤 Lee Middleman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:19
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/145; A61B5/1455; A61B5/14551; A61B5/14552; A61B5/02; A61B5/024; A61B5/02416; A61B5/02427; A61B2562/00; A61B2562/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
183 words
A non-invasive, electrooptical sensor for removable attachment to the skin of a patient comprising: a first flexible substrate having first and second portions which are connected to each other; a light emitter mounted on one of said first and second portions of said first substrate; a light detector mounted on one of said first and second portions of said first substrate; a plurality of conductive lines deposited on said first substrate, at least one being connected to said light emitter and at least one being connected to said light detector, at least two of said conductive lines extending across a first surface of said first portion and a second surface of said second portion, said first and second surfaces facing each other, said light emitter and light detector facing the same direction; an insulating layer separating said first and second surfaces; and wherein at least one of said light emitter and light detector comprised an unpackaged semiconductor die having an electrical contact pad on a face thereof, which is directly mounted on a conductive area on said flexible substrate and electrically connected thereto.
Claim 2
Dependent Claim
183 words
A non-invasive, electrooptical sensor for removable attachment to the skin of a patient comprising: a first flexible substrate having first and second portions which are connected to each other; a light emitter mounted on one of said first and second portions of said first substrate; a light detector mounted on one of said first and second portions of said first substrate; a plurality of conductive lines deposited on said first substrate, at least one being connected to said light emitter and at least one being connected to said light detector, at least two of said conductive lines extending across a first surface of said first portion and a second surface of said second portion, said first and second surfaces facing each other, said light emitter and light detector facing the same direction; an insulating layer separating said first and second surfaces; and wherein at least one of said light emitter and light detector comprised an unpackaged semiconductor die having an electrical contact pad on a face thereof, which is directly mounted on a conductive area on said flexible substrate and electrically connected thereto.
Claim 3
Dependent Claim
31 words
The sensor of claim 1 further comprising a wire bond coupling an electrical contact pad on a second face of said semiconductor die directly to another conductive area on said substrate.
Claim 4
Dependent Claim
33 words
The sensor of claim 1 wherein the semiconductor face has a second electrical contact pad thereon which is directly mounted on a second conductive area on said flexible substrate and electrically connected thereto.
Claim 5
Dependent Claim
37 words
The sensor of claim 1 further comprising a coding resistor on the substrate whose value is trimmed to provide an indication of a wavelength of the light emitter after the light emitter is mounted on the substrate.
Claim 6
Dependent Claim
15 words
The sensor of claim 1 further comprising: a pre-formed lens covering said unpackaged semiconductor die.
Claim 7
Dependent Claim
23 words
The sensor of claim 5 further comprising a clear epoxy covering and encapsulating said semiconductor die, between said semiconductor die and said lens.
Claim 8
Dependent Claim
18 words
The sensor of claim 1 further comprising: a Faraday shield on said first substrate adjacent said light detector.
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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) | 2000-10-20 | 2001-04-21 | 2001-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-10-20 | 2005-04-21 | 2005-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-10-20 | 2009-04-21 | 2009-10-21 | $7700.00 | Window Closed / Lapsed |