Methods, devices, and systems related to forming semiconductor power devices with a handle substrate
First Claim
1. A method, comprising:
- forming a semiconductor device assembly that includes;
a handle substrate;
a semiconductor structure having a first side, a second side opposite the first side, and a gate region, wherein the gate region is between the source and drain regions of a transistor device; and
an intermediary material between the semiconductor structure and the handle substrate;
removing material from the semiconductor structure to form an opening extending from the first side of the semiconductor structure to at least the intermediary material at the second side of the semiconductor structure, wherein the opening extends through the gate region; and
decoupling the semiconductor structure from the handle substrate, wherein decoupling the semiconductor structure includes;
attaching a transfer structure to the semiconductor structure at the first side and such that a portion of the transfer structure extends across, and thereby completely covers, the opening; and
removing at least a portion of the intermediary material via the opening in the gate region of the semiconductor structure to undercut the second side of the semiconductor structure, wherein removing the intermediary material includes exposing the intermediary material to an etchant via the opening and by flowing the etchant between the portion of the transfer structure and a portion of the handle substrate facing the portion of the transfer structure across the opening.
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Abstract
Methods of manufacturing device assemblies, as well as associated semiconductor assemblies, devices, systems are disclosed herein. In one embodiment, a method of forming a semiconductor device assembly includes forming a semiconductor device assembly that includes a handle substrate, a semiconductor structure having a first side and a second side opposite the first side, and an intermediary material between the semiconductor structure and the handle substrate. The method also includes removing material from the semiconductor structure to form an opening extending from the first side of the semiconductor structure to at least the intermediary material at the second side of the semiconductor structure. The method further includes removing at least a portion of the intermediary material through the opening in the semiconductor structure to undercut the second side of the semiconductor structure.
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Citations
17 Claims
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1. A method, comprising:
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forming a semiconductor device assembly that includes; a handle substrate; a semiconductor structure having a first side, a second side opposite the first side, and a gate region, wherein the gate region is between the source and drain regions of a transistor device; and an intermediary material between the semiconductor structure and the handle substrate; removing material from the semiconductor structure to form an opening extending from the first side of the semiconductor structure to at least the intermediary material at the second side of the semiconductor structure, wherein the opening extends through the gate region; and decoupling the semiconductor structure from the handle substrate, wherein decoupling the semiconductor structure includes; attaching a transfer structure to the semiconductor structure at the first side and such that a portion of the transfer structure extends across, and thereby completely covers, the opening; and removing at least a portion of the intermediary material via the opening in the gate region of the semiconductor structure to undercut the second side of the semiconductor structure, wherein removing the intermediary material includes exposing the intermediary material to an etchant via the opening and by flowing the etchant between the portion of the transfer structure and a portion of the handle substrate facing the portion of the transfer structure across the opening. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of forming a semiconductor device assembly, comprising:
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forming a stack of semiconductor materials on a handle substrate, the stack of semiconductor materials including a gate region of a transistor device; forming openings in the stack of semiconductor materials, wherein portions of the handle substrate are exposed through the openings, and wherein the openings include a first opening extending through the gate region, a second opening adjacent a source region of the transistor device, and a third opening adjacent a drain region of the transistor device; attaching a transfer structure to the stack of semiconductor materials, wherein portions of the transfer structure extend across and completely cover corresponding ones of the openings to define passageways between the portions of the handle substrate and the corresponding portions of the transfer structure; and undercutting the stack of semiconductor materials adjacent the openings in the stack of semiconductor materials, wherein undercutting the stack of semiconductor materials includes flowing etchant into the passageways. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification