US5054683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of bonding together two bodies with silicon oxide and practically pure boron
Assignee: US Philips Corp
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Filing: 1990-08-29
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Granted: 1991-10-08
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Expires: 2010-08-29
Abstract
Abstract A method is set forth of bonding together two bodies (1, 2), according to which a first body (1) is provided with a flat surface (5) and the second body (2) is provided with a silicon oxide layer (4) with a flat surface (6), after which a connecting layer (7) containing boron is provided on at least one of the two flat surfaces. Subsequently, the two bodies (1, 2) are pressed together at elevated temperature, so that a borosilicate glass layer is formed. According to the invention, a layer of practically pure boron is used by way of connecting layer (7). Among the advantages of this is that the composition of the borosilicate glass layer is exclusively determined by the previously chosen layer thicknesses.
Inventors
- 👤 Jan Haisma
- 👤 Gijsbertus Spierings
- 👤 Joseph G. Van Lierop
- 👤 Hendrik F. Van Den Berg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:14
CPC Classifications
H; H10; H10D; H10D84/00; H10D84/01; H10P; H10P90/00; H10P90/19; H10P90/1904; H10P90/1906; H10P90/1914; H10D86/00; H10D86/01; H10D86/03; Y; Y10; Y10S; Y10S148/00; Y10S148/133; Y10S228/00; Y10S228/903
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
127 words
A method of bonding together a first body and a second body comprising the steps of (a) providing each of a first body and a second body with a flat surface, (b) coating said flat surface of at least one of said first body and said second body with a silicon oxide layer, (c) providing said silicon oxide layer with a flat surface, (d) applying a layer of practically pure boron to at least one of said flat surfaces, (e) pressing said first and second bodies together at said flat surfaces for a period of time at an elevated temperature, said layer of practically pure boron being a connecting layer, and then (f) removing material from one of said two bodies to make said one body thin.
Claim 2
Independent Claim
127 words
A method of bonding together a first body and a second body comprising the steps of (a) providing each of a first body and a second body with a flat surface, (b) coating said flat surface of at least one of said first body and said second body with a silicon oxide layer, (c) providing said silicon oxide layer with a flat surface, (d) applying a layer of practically pure boron to at least one of said flat surfaces, (e) pressing said first and second bodies together at said flat surfaces for a period of time at an elevated temperature, said layer of practically pure boron being a connecting layer, and then (f) removing material from one of said two bodies to make said one body thin.
Claim 3
Dependent Claim
25 words
A method as claimed in claim 1, wherein said layer of practically pure boron is polished before said first and second bodies are pressed together.
Claim 4
Dependent Claim
21 words
A method as claimed in claim 2, wherein said layer of practically pure boron is polished to an optically smooth surface.
Claim 5
Dependent Claim
28 words
A method as claimed in claim 3, wherein said layer of practically pure boron is applied to said flat surfaces at both of said first and second bodies.
Claim 6
Dependent Claim
62 words
A method as claimed in claim 1, wherein said step (e) of pressing said first and second bodies together is carried out at a pressure between 1×10 5 and 1×10 7 N/m 2 , wherein said elevated temperature is between 900° and 1050° C., and wherein said period of time is between at least a few minutes and at most four hours.
Claim 7
Dependent Claim
35 words
A method as claimed in claim 1, wherein said layer of practically pure boron has thickness between 1 and 200 nm, and wherein said silicon oxide layer has a thickness between 0.01 and 2 μm.
Claim 8
Dependent Claim
45 words
A method as claimed in claim 1, wherein said elevated temperature is obtained by heating said practically pure boron with radiation, said radiation being transmitted through one of said first and second bodies, and said radiation being absorbed by said layer of practically pure boron.
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) | 1994-10-07 | 1995-04-08 | 1995-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-07 | 1999-04-08 | 1999-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-07 | 2003-04-08 | 2003-10-08 | $7700.00 | Window Closed / Lapsed |