US4787362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive blade having a polycrystalline ceramic core
Assignee: Thermocarbon Inc
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Filing: 1988-04-01
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Granted: 1988-11-29
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Expires: 2008-04-01
Abstract
Abstract An abrasive cutting blade having very high rigidity, has a core which is a disc of low porosity, polycrystalline structural ceramic and an abrasive material adhered to the periphery thereof. The structural ceramic may be conductive or non-conductive and the abrasive may be adhered by resin bonding, electroplating, sintering or pressing.
Inventors
- 👤 John N. Boucher
- 👤 David E. Bajune
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:31
CPC Classifications
B; B23; B23D; B23D61/00; B23D61/02; B23D61/028; B24; B24D; B24D3/00; B24D3/02; B24D3/04; B24D3/14; B24D3/18; B24D5/00; B24D5/12; B28; B28D; B28D1/00; B28D1/02; B28D1/12; B28D1/121
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
76 words
An abrasive dicing blade comprising: an annular disc less than 0.025 in. in thickness, said disc having an inner and an outer diameter, and being formed from a fine grain, low porosity, polycrystalline, non-conductive, structural ceramic, and an abrasive material, which is a polymerized resin matrix in which abrasive particles are embedded, adhered to an outer peripheral surface of said annular disc, said abrasive material having a thickness greater than the thickness of said annular disc.
Claim 2
Dependent Claim
76 words
An abrasive dicing blade comprising: an annular disc less than 0.025 in. in thickness, said disc having an inner and an outer diameter, and being formed from a fine grain, low porosity, polycrystalline, non-conductive, structural ceramic, and an abrasive material, which is a polymerized resin matrix in which abrasive particles are embedded, adhered to an outer peripheral surface of said annular disc, said abrasive material having a thickness greater than the thickness of said annular disc.
Claim 3
Dependent Claim
14 words
An abrasive dicing according to claim 1 wherein said abrasive material contains diamond particles.
Claim 4
Dependent Claim
16 words
An abrasive dicing blade according to claim 1 wherein said abrasive material contains silicon carbide particles.
Claim 5
Dependent Claim
16 words
An abrasive dicing blade according to claim 1 wherein said abrasive material contains boron nitride particles.
Claim 6
Dependent Claim
16 words
An abrasive dicing blade according to claim 1 wherein said abrasive material contains aluminum oxide particles.
Claim 7
Dependent Claim
17 words
An abrasive dicing blade according to claim 1 wherein said polymerized resin matrix is a thermosetting phenolic.
Claim 8
Dependent Claim
16 words
An abrasive dicing blade according to claim 1 wherein said polymerized resin matrix is an epoxide.
Claim 9
Dependent Claim
16 words
An abrasive dicing blade according to claim 1 wherein said polymerized resin matrix is a polyimide.
Claim 10
Dependent Claim
26 words
An abrasive dicing blade according to claim 1 wherein said ceramic disc has a Young's Modulus of Elasticity equal to or greater than 30×10 6 psi.
Claim 11
Dependent Claim
15 words
An abrasive dicing blade according to claim 1 wherein said non-conductive cermaic is aluminum oxide.
Claim 12
Dependent Claim
15 words
An abrasive dicing blade according to claim 1 wherein said non-conductive ceramic is silicon carbide.
Claim 13
Dependent Claim
15 words
An abrasive dicing blade according to claim 1 wherein said non-conductive ceramic is silicon nitride.
Claim 14
Dependent Claim
18 words
An abrasive dicing blade according to claim 1, wherein said non-conductive ceramic is coated with a conductive material.
Claim 15
Dependent Claim
24 words
An abrasive dicing blade according to claim 1 wherein the width of said abrasive material is greater than the width of said ceramic disc.
Claim 16
Independent Claim
60 words
A method for making an abrasive dicing blade comprising: (a) forming a disc less than 0.025 in thick of fine grain, low porosity, polycrystalline, non-conductive, structural ceramic, said disc having an inner and outer diameter; (b) adhering an abrasive material which is a polymerized resin matrix in which abrasive particles are embedded to an outer circumferential periphery of said disc.
Claim 17
Independent Claim
60 words
A method for making an abrasive dicing blade comprising: (a) forming a disc less than 0.025 in thick of fine grain, low porosity, polycrystalline, non-conductive, structural ceramic, said disc having an inner and outer diameter; (b) adhering an abrasive material which is a polymerized resin matrix in which abrasive particles are embedded to an outer circumferential periphery of said disc.
Claim 18
Dependent Claim
25 words
A method according to claim 15 further comprising forming at least one step on each side of the outer circumferential periphery of said ceramic disc.
Claim 19
Dependent Claim
20 words
A method according to claim 15 further comprising forming a plurality of notches in the periphery of said ceramic disc.
Claim 20
Dependent Claim
24 words
A method according to claim 15 wherein said disc of structural ceramic is formed by cutting a disc from a sheet of structural ceramic.
Claim 21
Dependent Claim
19 words
A method according to claim 15 wherein said abrasive material is adhered to said ceramic disc by adhesive bonding.
Claim 22
Dependent Claim
42 words
A method according to claim 15 wherein in said abrasive material comprises abrasive hard particles in a polymeric resin and the resin is adhered to the outer peripheral circumference of said ceramic disc by molding said abrasive material on said ceramic disc.
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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) | 1991-11-29 | 1992-05-30 | 1992-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-29 | 1996-05-30 | 1996-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-29 | 2000-05-30 | 2000-11-29 | $7700.00 | Window Closed / Lapsed |