IP Library Patent Application 16948665
Patent Application
App. No. 16/948,665

WIDE BANDGAP WAFER BACKSIDE CAPPED BY A DETECTION FACILITATING LAYER

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Quick Facts
Patent No.
US None
App. No.
16/948,665
Abstract

In one general aspect, an apparatus can include a wide bandgap wafer having a backside and a frontside. The apparatus can include a detection facilitating layer capped on the backside of the wide bandgap wafer, the detection facilitating layer having a thickness less than a thickness of the wide bandgap wafer.

Claims (33)

1 . An apparatus, comprising:

a wide bandgap wafer having a backside and a frontside; and

a detection facilitating layer capped on the backside of the wide bandgap wafer, the detection facilitating layer having a thickness less than a thickness of the wide bandgap wafer.

2 . The apparatus of claim 1 , wherein detection facilitating layer is a polycrystalline SiC layer.

3 . The apparatus of claim 1 , wherein the wide bandgap wafer includes at least one of a Silicon Carbide (SiC) wafer, a Gallium Nitride (GaN) wafer, a Gallium Oxide (Ga 2 O 3 ) wafer, an Aluminum Nitride (AlN) wafer, or a diamond wafer.

4 . The apparatus of claim 1 , wherein the detection facilitating layer has a thickness of at least approximately 1 micrometer.

5 . The apparatus of claim 1 , wherein the detection facilitating layer is chemically formed on the wide bandgap wafer.

6 . The apparatus of claim 1 , wherein the detection facilitating layer is not a separate wafer bonded to the wide bandgap wafer.

7 . The apparatus of claim 1 , wherein one or more semiconductor elements are formed on or within at least a portion of the frontside of the wide bandgap wafer.

8 . The apparatus of claim 1 , wherein the capping includes depositing the detection facilitating layer using a chemical vapor deposition process.

9 . A method, comprising:

forming a dielectric layer on a frontside of a wide bandgap wafer; and

forming a detection facilitating layer on a backside of the wide bandgap wafer using a chemical formation process.

10 . The method of claim 9 , wherein the detection facilitating layer has a thickness less than a thickness of the wide bandgap wafer.

11 . The method of claim 9 , wherein the forming the detection facilitating layer includes forming using a chemical vapor deposition process.

12 . The method of claim 9 , wherein the dielectric layer is a first dielectric layer, the method further comprising:

forming a second dielectric layer on the backside of the wide bandgap wafer; and

removing the second dielectric layer from the backside of the wide bandgap wafer using an etch process.

13 . The method of claim 9 , further comprising:

removing the dielectric layer from the frontside of the wide bandgap wafer; and

forming a semiconductor element at least one of within or on the frontside of the wide bandgap wafer.

14 . The method of claim 13 , further comprising:

removing the polycrystalline SiC layer from the wide bandgap wafer after the forming of the semiconductor element is completed.

15 . An apparatus, comprising:

a tool configured to receive a capped wide bandgap wafer having a backside and a frontside, the capped wide bandgap wafer having a detection facilitating layer capped on the backside of the wide bandgap wafer; and

a sensor configured to detect that the capped wide bandgap wafer has been received by the tool in response to a signal emitted from the sensor.

16 . The apparatus of claim 15 , wherein the signal is an infrared signal and the sensor is an infrared sensor.

17 . The apparatus of claim 15 , wherein the sensor is configured to detect the capped wide bandgap wafer during at least one of loading or unloading the capped wide bandgap wafer.

18 . The apparatus of claim 15 , wherein the tool is configured to contact the detection facilitating layer of the capped wide bandgap wafer.

19 . A method, comprising:

receiving, within a tool, a capped wide bandgap wafer having a backside and a frontside, the capped wide bandgap wafer having a polycrystalline SiC layer capped on the backside of the wide bandgap wafer; and

emitting a signal from a sensor such that capped wide bandgap wafer is detected in response to the signal emitted from the sensor.

20 . The method of claim 19 , wherein the signal is an infrared signal and the sensor is an infrared sensor.

Assignments (3)
RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL 054523, FRAME 0378 Recorded Aug 16, 2023
From: DEUTSCHE BANK AG NEW YORK BRANCH, AS COLLATERAL AGENT
To: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
Reel/Frame 064615/0602 →
SECURITY INTEREST Recorded Nov 25, 2020
From: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
To: DEUTSCHE BANK AG NEW YORK BRANCH, AS COLLATERAL AGENT
Reel/Frame 054523/0378 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 28, 2020
From: YOSHIDA, TETSUYA; HOSOYA, TAKUMI; SHIMOYOSHI, HIDETO; YAMAZAKI, KAZUHIRO
To: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
Reel/Frame 053905/0576 →