Printable device wafers with sacrificial layers
First Claim
1. A wafer comprising:
- a substrate; and
a patterned sacrificial layer disposed on the substrate, the patterned sacrificial layer comprising an array of spaced-apart sacrificial patterns separated by anchors,wherein the spaced-apart sacrificial portions can be substantially selectively etched by an etchant and the anchors are not substantially selectively etched by the etchant, andwherein the anchors have a thickness that is entirely greater than or equal to a thickness of the spaced-apart sacrificial patterns between the spaced-apart sacrificial patterns.
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Accused Products
Abstract
Methods of forming integrated circuit devices include forming a sacrificial layer on a handling substrate and forming a semiconductor active layer on the sacrificial layer. The semiconductor active layer and the sacrificial layer may be selectively etched in sequence to define an semiconductor-on-insulator (SOI) substrate, which includes a first portion of the semiconductor active layer. A multi-layer electrical interconnect network may be formed on the SOI substrate. This multi-layer electrical interconnect network may be encapsulated by an inorganic capping layer that contacts an upper surface of the first portion of the semiconductor active layer. The capping layer and the first portion of the semiconductor active layer may be selectively etched to thereby expose the sacrificial layer. The sacrificial layer may be selectively removed from between the first portion of the semiconductor active layer and the handling substrate to thereby define a suspended integrated circuit chip encapsulated by the capping layer.
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Citations
21 Claims
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1. A wafer comprising:
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a substrate; and a patterned sacrificial layer disposed on the substrate, the patterned sacrificial layer comprising an array of spaced-apart sacrificial patterns separated by anchors, wherein the spaced-apart sacrificial portions can be substantially selectively etched by an etchant and the anchors are not substantially selectively etched by the etchant, and wherein the anchors have a thickness that is entirely greater than or equal to a thickness of the spaced-apart sacrificial patterns between the spaced-apart sacrificial patterns. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A wafer of devices comprising:
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a substrate; a sacrificial layer disposed on the substrate, wherein the sacrificial layer comprises an array of recesses; an array of devices, each device of the array of devices laterally attached to at least one tether at least partially in a common layer with the device such that the device is suspended over a respective recess in the array of recesses with each of the at least one tether laterally extending from a sidewall of the respective recess, thereby defining a gap between the device and the substrate. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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Specification