Patent EP0032801A2 successfully refreshed from Google Patents.
EP0032801A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method of dicing a semiconductor wafer
Assignee: Toshiba Corp
•
Filing: 1981-01-13
•
Granted: —
•
Expires: 2001-01-13
Abstract
Abstract A method of dicing a semiconductor wafer in which a physical discontinuity is formed on the surface of the wafer on both sides of a dicing line to limit the spreading of cracks and chips generated during dicing. Thereafter, the semiconductor wafer is diced to separate the pellets.
Inventors
- 👤 Masahiro Abe
- 👤 Masafumi Miyagawa
- 👤 Hatsuo Nakamura
- 👤 Toshio Yonezawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 07:46
CPC Classifications
H; H10; H10P; H10P52/00; Y; Y10; Y10S; Y10S148/00; Y10S148/028; Y10T; Y10T225/00; Y10T225/10; Y10T225/12; Y10T29/00; Y10T29/49; Y10T29/49789; Y10T29/4979; Y10T29/49792
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
36 words
A method of preparing a semiconductor wafer for division into pellets comprising the steps of: forming a physical discontunity on both sides of a predetermined dicing line; and dicing said semiconductor wafer along said dicing line.
Claim 2
Independent Claim
36 words
A method of preparing a semiconductor wafer for division into pellets comprising the steps of: forming a physical discontunity on both sides of a predetermined dicing line; and dicing said semiconductor wafer along said dicing line.
Claim 3
Dependent Claim
34 words
A method according to claim 1, wherein said forming step comprises the step of introducing a change in the level of the surface of said semiconductor wafer on both sides of said dicing line.
Claim 4
Dependent Claim
27 words
A method according to claim 1 or claim 2, wherein said forming step comprises the step of forming a groove on both sides of said dicing line.
Claim 5
Dependent Claim
30 words
A method according to claim 1 or claim 2 wherein said forming step comprises the step of forming a protuberance over said dicing line and extending beyond said dicing line.
Claim 6
Dependent Claim
36 words
A method according to claim 1 or claim 2, wherein said forming step comprises the step of forming a groove along said dicing line, said groove having at least a portion broader than said dicing line.
Claim 7
Dependent Claim
30 words
A method according to claim 1, wherein said forming step comprises the step of disposing a material different to the material of said wafer over the surface of said wafer.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.