Semiconductor wafer having a thin die and tethers and methods of making the same
First Claim
1. A semiconductor wafer comprising:
- a support body made of a semiconductor material;
at least one thin die having a circuit formed thereon, the thin die having an outer perimeter defined by an open trench, the open trench separating the thin die from the support body; and
a plurality of tethers extending across the open trench and between the support body and the at least one thin die.
2 Assignments
0 Petitions
Accused Products
Abstract
A semiconductor wafer (70) that includes a support body (72), at least one thin die (20, 60), and a plurality of tethers (78, 178). The support body (72) is made of a semiconductor material. The thin die (20, 60) has a circuit (21) formed thereon and has an outer perimeter (74) defined by an open trench (76). The open trench (76) separates the thin die (20, 60) from the support body (72). The tethers (78, 178) extend across the open trench (76) and between the support body (72) and the thin die (20, 60). A method of making a thin die (20, 60) on a wafer (70) where the wafer (70) has a support body (72), a topside (82) and a backside (90). A circuit (21) is formed on the topside (82) of the wafer (70). The method may include the steps of: forming a cavity (88) on the backside (90) of the wafer (70) beneath the circuit (21) that defines a first layer (92) that includes the circuit (21); forming a trench (76) around the circuit (21) on the topside (82) of the wafer (70) that defines an outer perimeter (74) of the thin die (20, 60); forming a plurality of tethers (78, 178) that extend across the trench (76) and between the wafer support body (72) and the thin die (20, 60); and removing a portion of the first layer (92) to define the bottom surface (75) of the thin die (20, 60).
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Citations
20 Claims
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1. A semiconductor wafer comprising:
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a support body made of a semiconductor material;
at least one thin die having a circuit formed thereon, the thin die having an outer perimeter defined by an open trench, the open trench separating the thin die from the support body; and
a plurality of tethers extending across the open trench and between the support body and the at least one thin die. - View Dependent Claims (2, 3, 4, 5, 6, 7, 11, 12)
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8. A wafer comprising:
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a support body made of a semiconductor material;
at least one thin semiconductor die having a circuit formed thereon, the thin semiconductor die having an outer perimeter defined by an open trench, the open trench separating the thin semiconductor die from the support body; and
a means for attaching the outer perimeter of the at least one thin semiconductor die to the support body across the open trench. - View Dependent Claims (9, 10)
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13. A wafer comprising:
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a support body made of a semiconductor the support body having a plurality of apertures and having a first thickness; and
a plurality of semiconductor dies each semiconductor die having an integrated circuit formed thereon and having a second thickness, the second thickness being substantially less than the first thickness;
wherein each of the dies is retained within one of the apertures in the support body such that a gap exists between an outer perimeter of each die and the support body, each die retained within the aperture by a plurality of tethers that extend across the gap and between the outer perimeter of each die and the support body. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification