Methods for marking a bare semiconductor die
First Claim
1. A method of marking a packaged semiconductor device comprising:
- providing a semiconductor die having a reduced cross-section in wafer form;
packaging said semiconductor die forming a packaged semiconductor device, said packaged semiconductor device having a surface;
applying a tape having optical energy-markable properties to at least a portion of said surface of said packaged semiconductor device;
subsequently exposing at least a portion of said tape to optical energy; and
forming a mark.
5 Assignments
0 Petitions
Accused Products
Abstract
The present invention provides a method and apparatus for marking a semiconductor wafer or device. The method and apparatus have particular application to wafers or devices which have been subjected to a thinning process, including back grinding in particular. The present method comprises reducing the cross-section of a wafer or device, applying a tape having optical energy-markable properties over a surface or edge of the wafer or device, and exposing the tape to an optical energy source to create an identifiable mark. A method for manufacturing an integrated circuit chip and for identifying a known good die are also disclosed. The apparatus of the present invention comprises a multilevel laser-markable tape for application to a bare semiconductor die. In the apparatus, an adhesive layer of the tape provides a homogenous surface for marking subsequent to exposure to electromagnetic radiation.
-
Citations
96 Claims
-
1. A method of marking a packaged semiconductor device comprising:
-
providing a semiconductor die having a reduced cross-section in wafer form;
packaging said semiconductor die forming a packaged semiconductor device, said packaged semiconductor device having a surface;
applying a tape having optical energy-markable properties to at least a portion of said surface of said packaged semiconductor device;
subsequently exposing at least a portion of said tape to optical energy; and
forming a mark. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
-
-
22. A method of marking a packaged semiconductor device having a semiconductor die comprising:
-
providing said semiconductor die in wafer form;
packaging said semiconductor die forming a packaged semiconductor device, said packaged semiconductor device having a surface;
applying a tape having optical energy-markable properties to at least a portion of said surface of said packaged semiconductor device;
subsequently exposing at least a portion of said tape to optical energy; and
forming a mark. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
-
-
43. A method of marking a semiconductor die comprising:
-
providing a semiconductor die having a reduced cross-section in wafer form;
packaging said semiconductor die forming a packaged semiconductor device, said packaged semiconductor device having a surface;
applying a tape having optical energy-markable properties to at least a portion of said surface of said packaged semiconductor device;
subsequently exposing at least a portion of said tape to optical energy; and
forming a mark. - View Dependent Claims (44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63)
-
-
64. A method of marking a semiconductor die after a thinning process for reducing a thickness of said semiconductor die, said semiconductor die having an active surface and a thinned surface, said method comprising:
-
providing said semiconductor die in wafer form;
applying a tape having optical energy-markable properties to at least a portion of said thinned surface of said semiconductor die;
subsequently exposing at least a portion of said tape to optical energy; and
forming a mark on a portion of said semiconductor die. - View Dependent Claims (65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84)
-
-
85. A method of marking a packaged semiconductor device comprising:
-
providing a semiconductor die having a reduced cross-section in sliced wafer form;
packaging said semiconductor die forming a packaged semiconductor device, said packaged semiconductor device having a surface;
applying a tape having optical energy-markable properties to at least a portion of said surface of said packaged semiconductor device;
subsequently exposing at least a portion of said tape to optical energy; and
forming a mark.
-
-
86. A method of marking a packaged semiconductor device having a semiconductor die comprising:
-
providing said semiconductor die in sliced wafer form;
packaging said semiconductor die forming a packaged semiconductor device, said packaged semiconductor device having a surface;
applying a tape having optical energy-markable properties to at least a portion of said surface of said packaged semiconductor device;
subsequently exposing at least a portion of said tape to optical energy; and
forming a mark.
-
-
87. A method of marking a semiconductor die comprising:
-
providing a semiconductor die having a reduced cross-section in sliced wafer form;
packaging said semiconductor die forming a packaged semiconductor device, said packaged semiconductor device having a surface;
applying a tape having optical energy-markable properties to at least a portion of said surface of said packaged semiconductor device;
subsequently exposing at least a portion of said tape to optical energy; and
forming a mark.
-
-
88. A method of marking a semiconductor die after a thinning process for reducing a thickness of said semiconductor die, said semiconductor die having an active surface and a thinned surface, said method comprising:
-
providing said semiconductor die in sliced wafer form;
applying a tape having optical energy-markable properties to at least a portion of said thinned surface of said semiconductor die;
subsequently exposing at least a portion of said tape to optical energy; and
forming a mark on a portion of said semiconductor die.
-
-
89. A method of marking a packaged semiconductor device comprising:
-
providing a semiconductor die having a reduced cross-section as a portion of a wafer;
packaging said semiconductor die forming a packaged semiconductor device, said packaged semiconductor device having a surface;
applying a tape having optical energy-markable properties to at least a portion of said surface of said packaged semiconductor device;
subsequently exposing at least a portion of said tape to optical energy; and
forming a mark.
-
-
90. A method of marking a packaged semiconductor device having a semiconductor die comprising:
-
providing said semiconductor die as apportion of a wafer;
packaging said semiconductor die forming a packaged semiconductor device, said packaged semiconductor device having a surface;
applying a tape having optical energy-markable properties to at least a portion of said surface of said packaged semiconductor device;
subsequently exposing at least a portion of said tape to optical energy; and
forming a mark.
-
-
91. A method of marking a semiconductor die comprising:
-
providing a semiconductor die having a reduced cross-section as a portion of a wafer;
packaging said semiconductor die forming a packaged semiconductor device, said packaged semiconductor device having a surface;
applying a tape having optical energy-markable properties to at least a portion of said surface of said packaged semiconductor device;
subsequently exposing at least a portion of said tape to optical energy; and
forming a mark.
-
-
92. A method of marking a semiconductor die after a thinning process for reducing a thickness of said semiconductor die, said semiconductor die having an active surface and a thinned surface, said method comprising:
-
providing said semiconductor die as a portion of a wafer;
applying a tape having optical energy-markable properties to at least a portion of said thinned surface of said semiconductor die;
subsequently exposing at least a portion of said tape to optical energy; and
forming a mark on a portion of said semiconductor die.
-
-
93. A method of marking a packaged semiconductor device comprising:
-
providing a semiconductor die having a reduced cross-section as a portion of a sliced wafer;
packaging said semiconductor die forming a packaged semiconductor device, said packaged semiconductor device having a surface;
applying a tape having optical energy-markable properties to at least a portion of said surface of said packaged semiconductor device;
subsequently exposing at least a portion of said tape to optical energy; and
forming a mark.
-
-
94. A method of marking a packaged semiconductor device having a semiconductor die comprising:
-
providing said semiconductor die as a portion of a sliced wafer;
packaging said semiconductor die forming a packaged semiconductor device, said packaged semiconductor device having a surface;
applying a tape having optical energy-markable properties to at least a portion of said surface of said packaged semiconductor device;
subsequently exposing at least a portion of said tape to optical energy; and
forming a mark.
-
-
95. A method of marking a semiconductor die comprising:
-
providing a semiconductor die having a reduced cross-section as a portion of a sliced wafer;
packaging said semiconductor die forming a packaged semiconductor device, said packaged semiconductor device having a surface;
applying a tape having optical energy-markable properties to at least a portion of said surface of said packaged semiconductor device;
subsequently exposing at least a portion of said tape to optical energy; and
forming a mark.
-
-
96. A method of marking a semiconductor die after a thinning process for reducing a thickness of said semiconductor die, said semiconductor die having an active surface and a thinned surface, said method comprising:
-
providing said semiconductor die as a portion of a sliced wafer;
applying a tape having optical energy-markable properties to at least a portion of said thinned surface of said semiconductor die;
subsequently exposing at least a portion of said tape to optical energy; and
forming a mark on a portion of said semiconductor die.
-
Specification