US4838950A
Expired / Lapsed
US
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Stabilization of intraconnections and interfaces
Assignee: BP SOLAR Inc
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Filing: 1988-04-22
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Granted: 1989-06-13
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Expires: 2008-04-22
Abstract
Abstract Stabilization of energy sensitive semiconductive devices by forming initial electrodes which are exposed through an overlying layer of semiconductor, dipping the exposed first electrode and the semiconductor layer in colloidal solutions, or well stirred suspensions of specified metal hydroxides, such as those of nickel, chromium, cobalt or related metals, followed by rinsing the non-sensitive side of the device in de-ionized water. After air drying, the deposition of an overlying second electrode is carried out by a metallization technique. The device is then heated in air, at 150° C. for four hours.
Inventors
- 👤 Kackadasam R. Ramaprasad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:15
CPC Classifications
H; H10; H10F; H10F71/00; H10F71/10; H10F71/103; H10F19/00; H10F19/30; H10F19/31; H10F77/00; H10F77/20; H10F77/244; Y; Y02; Y02E; Y02E10/00; Y02E10/50; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
65 words
The method of stabilizing semiconductor devices with intraconnections, which comprises the steps of: (a) providing the device with a first electrode which is exposed through an overlying layer of semiconductor; (b) dipping the device in a colloidal solution of a metal hydroxide or a well stirred suspension of the said metal hydroxide in water; (c) providing a further contact with respect to the first contact.
Claim 2
Independent Claim
65 words
The method of stabilizing semiconductor devices with intraconnections, which comprises the steps of: (a) providing the device with a first electrode which is exposed through an overlying layer of semiconductor; (b) dipping the device in a colloidal solution of a metal hydroxide or a well stirred suspension of the said metal hydroxide in water; (c) providing a further contact with respect to the first contact.
Claim 3
Dependent Claim
30 words
The method of claim 1, wherein the non-sensitive or the back side of the said device is rinsed in de-ionized water after the dipping, but before providing the second contact
Claim 4
Dependent Claim
25 words
The method of claim 2 wherein the said device, after the second contact is provided, is heated in air at 150° C. for 4 hours.
Claim 5
Dependent Claim
15 words
The method of claim 1 wherein the dipping time is approximately 10 to 60 seconds.
Claim 6
Dependent Claim
21 words
The method of claim 1 wherein the said colloidal solution or well stirred suspension in water is that of nickel hydroxide.
Claim 7
Dependent Claim
24 words
The method of claim 5 wherein the nickel ion concentration either in the nickel hydroxide colloidal solution or a well stirred suspension is 0.02M.
Claim 8
Dependent Claim
25 words
The method of claim 1 wherein the metal hydroxide either as a colloidal solution or a well stirred suspension in water is that of chromium.
Claim 9
Dependent Claim
30 words
The method of claim 1 wherein the device is a constituent of a solar panel with a front electrode of conductive metal oxide which underlies a layer of amorphous semiconductor
Claim 10
Dependent Claim
27 words
The method of claim 1 wherein the device is a constituent of an integrated circuit with exposed silicon that is to be subsequently covered with a metal.
Claim 11
Dependent Claim
38 words
The method of claim 1 wherin the rinsing of the non-sensitive or back side is followed by air drying and metallic deposition, to provide the final contacting element, followed by heating at 150° C. for about 4 hours.
Claim 12
Independent Claim
80 words
A device with intraconnected electrodes, comprising: a substrate; a first electrode upon said substrate; an amorphous semiconductor upon said first electrode; a metal hydroxide adsorbed on portions of said first electrode and on said amorphous semiconductor, brought about by dipping in a colloidal solution or a well stirred suspension of the said metal hydroxide in water; and a second electrode upon said semiconductor extending into contact with said first electrode at the interface of said first electrode with metal hydroxide.
Claim 13
Independent Claim
80 words
A device with intraconnected electrodes, comprising: a substrate; a first electrode upon said substrate; an amorphous semiconductor upon said first electrode; a metal hydroxide adsorbed on portions of said first electrode and on said amorphous semiconductor, brought about by dipping in a colloidal solution or a well stirred suspension of the said metal hydroxide in water; and a second electrode upon said semiconductor extending into contact with said first electrode at the interface of said first electrode with metal hydroxide.
Claim 14
Dependent Claim
12 words
The device of claim 11 wherein the metal hydroxide is nickel hydroxie.
Claim 15
Dependent Claim
12 words
The device of claim 11 wherein the metal hydroxide is chromium hydroxide.
Claim 16
Dependent Claim
104 words
The invention of claim 11 wherein the said device is a solar panel comprising a substrate with a plurality of discrete, transparent, first electrodes thereon; a layer of amorphous semiconductor upon the transparent electrode; a plurality of second, back electrodes upon said semiconductor layer and opposite the transparent electrodes; an interface between a portion of each discrete transparent, first electrode and the opposite, second, back electrode with said metal hydroxide present at said interface; and an interface between the amorphous semiconductor and each of the second, back electrode with metal hydroxide at each said interface; thereby to enhance the thermal stability of said device.
Claim 17
Dependent Claim
39 words
The device of claim 11 wherein said metal hydroxide is adsorbed upon said first electrode and said amorphous semiconductor to promote better contact stability with said first electrode and interface stability between the amorphous semiconductor and the second electrode.
Claim 18
Dependent Claim
27 words
The device of claim 11 wherein the said amorphous semi conductor is silicon and promotes better interface stability between the silicon and the second electrode deposited thereon.
References Cited (Backward Citations)
US4675466A
Cited
US4770716A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-12 | 1992-12-12 | 1993-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-12 | 1996-12-12 | 1997-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-12 | 2000-12-12 | 2001-06-13 | $7700.00 | Window Closed / Lapsed |