Patent US5224969A successfully refreshed from Google Patents.
US5224969A
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Diamond having multiple coatings and methods for their manufacture
Assignee: Saint Gobain Abrasives Inc
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Filing: 1992-04-13
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Granted: 1993-07-06
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Expires: 2012-04-13
Abstract
Abstract A diamond element having good bonding properties and a method for fabricating the diamond element in which a diamond substrate is coated by and bonded to a first layer of chromium carbide, a second layer containing titanium, vanadium, zirconium, niobium, tantalum, iron, cobalt, nickel or copper, is bonded to said first layer, and a third layer of tungsten, or molybdenum deposited by a CVD technique utilizing metal halides, is bonded to said second layer. The second layer functions to protect the chromium carbide layer against attack by halide containing gas during the CVD deposition of the tungsten, or molybdenum.
Inventors
- 👤 Sy-Hwa Chen
- 👤 Jeffrey S. Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:15
CPC Classifications
C; C23; C23C; C23C22/00; B; B24; B24D; B24D3/00; B24D3/02; B24D3/04; B24D3/06; C09; C09K; C09K3/00; C09K3/14; C09K3/1436; C09K3/1445; Y; Y10; Y10T; Y10T428/00; Y10T428/30; Y10T428/31504; Y10T428/31551; Y10T428/31609; Y10T428/31612; Y10T428/31678
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
76 words
A diamond element having good bonding properties, comprising: a. a diamond substrate; b. a first layer bonded to said diamond substrate; c. a second layer bonded to said first layer; and d. a third layer bonded to said second layer, said first layer including chromium carbide, said third layer including a transition element and said second layer including an element selected from the group consisting of titanium, vanadium, zirconium, niobium, tantalum, iron/ cobalt, nickel and copper.
Claim 2
Dependent Claim
76 words
A diamond element having good bonding properties, comprising: a. a diamond substrate; b. a first layer bonded to said diamond substrate; c. a second layer bonded to said first layer; and d. a third layer bonded to said second layer, said first layer including chromium carbide, said third layer including a transition element and said second layer including an element selected from the group consisting of titanium, vanadium, zirconium, niobium, tantalum, iron/ cobalt, nickel and copper.
Claim 3
Dependent Claim
16 words
The diamond element as recited in claim 1 wherein said second layer comprises a metal nitride.
Claim 4
Dependent Claim
92 words
An article of manufacture containing a firmly secured diamond element, said tool comprising: a. a diamond substrate; b. a first layer chemically bonded to said diamond substrate; c. a second layer chemically bonded to said first layer; d. a third layer chemically bonded to said second layer; and e. a body bonded to said third layer, said first layer including chromium carbide, said third layer including a transition element and said second layer including an element selected from the group consisting of titanium, vanadium, zirconium, niobium, tantalum, iron, cobalt, nickel and copper.
Claim 5
Dependent Claim
92 words
An article of manufacture containing a firmly secured diamond element, said tool comprising: a. a diamond substrate; b. a first layer chemically bonded to said diamond substrate; c. a second layer chemically bonded to said first layer; d. a third layer chemically bonded to said second layer; and e. a body bonded to said third layer, said first layer including chromium carbide, said third layer including a transition element and said second layer including an element selected from the group consisting of titanium, vanadium, zirconium, niobium, tantalum, iron, cobalt, nickel and copper.
Claim 6
Dependent Claim
17 words
The article of manufacture as recited in claim 3 wherein said second layer comprises a metal nitride.
Claim 7
Independent Claim
85 words
A method for producing a diamond element capable of being securely bonded to a substrate, the method comprising the steps of: a. depositing a first layer on said diamond element; b. depositing a second layer on said diamond element; and c. depositing a third layer on said diamond element, said first layer including chromium carbide, said third layer including a transition element and said second layer including an element selected from the group consisting of titanium, vanadium, zirconium, niobium, tantalum, iron, cobalt, nickel and copper.
Claim 8
Independent Claim
85 words
A method for producing a diamond element capable of being securely bonded to a substrate, the method comprising the steps of: a. depositing a first layer on said diamond element; b. depositing a second layer on said diamond element; and c. depositing a third layer on said diamond element, said first layer including chromium carbide, said third layer including a transition element and said second layer including an element selected from the group consisting of titanium, vanadium, zirconium, niobium, tantalum, iron, cobalt, nickel and copper.
Claim 9
Dependent Claim
51 words
The method as recited in claim 5 wherein said step of depositing a third layer comprises the step of depositing said tungsten or molybdenum in a chemical vapor deposition process in the presence of halide gas and wherein said second layer comprises a compound resistant to attack by said halide gas.
Claim 10
Dependent Claim
29 words
The method as recited in claim 6 wherein said step of depositing a second layer includes the step of depositing a layer of material resistant to attack by halides.
Claim 11
Dependent Claim
27 words
The method as recited in claim 5 wherein said step of depositing a second layer includes the step of passivating said second layer against attack by halides.
Claim 12
Dependent Claim
13 words
The method as recited in claim 8 wherein said passivating step includes nitridation.
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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) | 1996-07-05 | 1997-01-04 | 1997-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-05 | 2001-01-04 | 2001-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-05 | 2005-01-04 | 2005-07-06 | $7700.00 | Window Closed / Lapsed |