Trench scribe line for decreased chip spacing
First Claim
1. A method of separating chips on a semiconductor wafer comprising the steps of:
- (a) providing a semiconductor wafer;
(b) etching a pattern of intersecting trenches on a selected surface of said wafer to define chip areas on said surface;
(c) forming a groove extending from a surface of said wafer opposing said selected surface aligned with said pattern of intersecting trenches; and
(d) breaking the region of semiconductor material in said wafer between said groove and said pattern of intersecting trenches to form individual chips.
1 Assignment
0 Petitions
Accused Products
Abstract
A method of scribing and separating chips on a semiconductor wafer (21) wherein the wafer (21) is patterned and a pattern of intersecting grooves is etched on a selected surface of the semiconductor wafer (21) in a pattern, preferably in a grid pattern, to define chip areas on that surface. Trenches (27) are then formed in the shape of the pattern and the selected surface is adhered to a tape (29). Light is then passed through the tape (29) and semiconductor wafer (21) from the pattern and a pattern of intersecting saw cuts or grooves (28) aligned with the light passing through the wafer (21) is formed. The saw cuts (28) extend from a surface of the wafer (21) opposing the selected surface and are aligned with the pattern of intersecting trenches (27).
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Citations
6 Claims
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1. A method of separating chips on a semiconductor wafer comprising the steps of:
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(a) providing a semiconductor wafer; (b) etching a pattern of intersecting trenches on a selected surface of said wafer to define chip areas on said surface; (c) forming a groove extending from a surface of said wafer opposing said selected surface aligned with said pattern of intersecting trenches; and (d) breaking the region of semiconductor material in said wafer between said groove and said pattern of intersecting trenches to form individual chips. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification