US4926197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic substrate for thermal ink jet printer
Assignee: HP Inc
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Filing: 1988-03-16
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Granted: 1990-05-15
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Expires: 2008-03-16
Abstract
Abstract A substrate for the print head of an ink jet printer includes a plastic base, a metallization layer overlying the plastic base, and a dielectric structure overlying the metallization layer. A thin film resistor is deposited over the substrate, as required. Acceptable materials include polyimide plastic for the base, copper or nickel for the metallization layer, and a bilayer construction of silicon dioxide overlying chromium or titanium for the dielectric structure.
Inventors
- 👤 Winthrop D. Childers
- 👤 Chris Schantz
- 👤 Eric Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:26
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/135; B41J2/14; B41J2/14016; B41J2/14088; B41J2/14112; B41J2/14129; B41J2202/00; B41J2202/01; B41J2202/03; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/05; H05K1/053
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
76 words
A thermal ink jet printer print head, comprising: a plastic base; a metallization layer overlying said plastic base; a dielectric structure overlying said metallization layer, the dielectric structure including a metallic adhesion layer overlying said metallization layer, and a layer of a dielectric material overlying said metallic adhesion layer; a resistor overlying the dielectric structure; and an orifice plate with an orifice therein and an ink channel overlying the thin film resistor and the dielectric structure.
Claim 2
Dependent Claim
76 words
A thermal ink jet printer print head, comprising: a plastic base; a metallization layer overlying said plastic base; a dielectric structure overlying said metallization layer, the dielectric structure including a metallic adhesion layer overlying said metallization layer, and a layer of a dielectric material overlying said metallic adhesion layer; a resistor overlying the dielectric structure; and an orifice plate with an orifice therein and an ink channel overlying the thin film resistor and the dielectric structure.
Claim 3
Dependent Claim
16 words
The print head of claim 1, wherein said plastic base is made of a polyimide plastic.
Claim 4
Dependent Claim
12 words
The print head of claim 1, wherein said metallization layer is copper.
Claim 5
Dependent Claim
12 words
The print head of claim 1, wherein said metallization layer is nickel.
Claim 6
Dependent Claim
21 words
The print head of claim 1, wherein said metallic adhesion layer is selected from the group consisting of titanium and chromium.
Claim 7
Dependent Claim
13 words
The print head of claim 1, wherein said dielectric material is silicon dioxide.
Claim 8
Dependent Claim
21 words
The print head of claim 1, wherein the thickness of said metallization layer is from about 0.1 to about 400 micrometers.
Claim 9
Dependent Claim
21 words
The print head of claim 1, wherein the thickness of said metallization layer is from about 10 to about 25 micrometers.
Claim 10
Dependent Claim
23 words
The print head of claim 1, wherein the thickness of said layer of dielectric material is from about 0.1 to about 10 micrometers.
Claim 11
Dependent Claim
21 words
The print head of claim 1, wherein the thickness of said plastic base is from about 25 to about 3000 micrometers.
Claim 12
Dependent Claim
21 words
The print head of claim 1, wherein the thickness of said plastic base is from about 50 to about 300 micrometers.
Claim 13
Dependent Claim
61 words
A thermal ink jet printer print head, comprising: a plastic base; a metallization layer overlying said plastic base; a dielectric structure overlying said metallization layer, the dielectric structure including a metallic adhesion layer overlying said metallization layer, and a layer of a dielectric material overlying said metallic adhesion layer; and means overlying the dielectric structure for ejecting a droplet of ink.
Claim 14
Dependent Claim
61 words
A thermal ink jet printer print head, comprising: a plastic base; a metallization layer overlying said plastic base; a dielectric structure overlying said metallization layer, the dielectric structure including a metallic adhesion layer overlying said metallization layer, and a layer of a dielectric material overlying said metallic adhesion layer; and means overlying the dielectric structure for ejecting a droplet of ink.
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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) | 1993-05-14 | 1993-11-13 | 1994-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-14 | 1997-11-13 | 1998-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-14 | 2001-11-13 | 2002-05-15 | $7700.00 | Window Closed / Lapsed |