IP Library Granted Patent US 11,830,771
Granted Patent B2
US 11,830,771 · App. 17/014,890 · Granted Nov 28, 2023

Semiconductor substrate production systems and related methods

Inventor: Michael J. Seddon (Gilbert, AZ)
Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
H01L21/7806B23K26/53C30B29/36B23K2101/40
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Quick Facts
Patent No.
US 11,830,771
App. No.
17/014,890
Granted
Nov 28, 2023
Kind
B2
Abstract

Implementations of a method of separating a semiconductor substrate from a boule including a semiconductor material may include creating a damage layer in a first end of a boule including semiconductor material; heating the boule; and cooling the boule to separate one or more semiconductor substrates from the boule at the damage layer.

Claims (31)

1. A method of separating a semiconductor substrate from a boule comprising a semiconductor material, the method comprising:

creating a damage layer in a first end of a boule comprising semiconductor material;

heating a bulk material of the boule; and

cooling the boule to separate one or more semiconductor substrates from the boule at the damage layer.

2. The method of claim 1 , wherein a thermal gradient between the first end and the bulk material of the boule assists the one or more semiconductor substrates with separating from the boule at the damage layer in the first end of the boule.

3. The method of claim 1 , wherein the damage layer is created through laser irradiation.

4. The method of claim 1 , further comprising creating a second damage layer in a second end of the boule.

5. The method of claim 4 , wherein a thermal gradient between the second end and the bulk material of the boule assists the one or more semiconductor substrates with separating from the boule at the damage layer in the second end of the boule.

6. The method of claim 1 , wherein cooling the boule further comprises contacting the boule with liquid nitrogen.

7. The method of claim 1 , wherein heating the boule comprises using a furnace or heated bath.

8. A method of separating a semiconductor substrate from a boule comprising a semiconductor material, the method comprising:

creating a damage layer in a first end of a boule comprising semiconductor material;

cooling the boule; and

heating the boule after cooling the boule to separate one or more semiconductor substrates from the boule at the damage layer.

9. The method of claim 8 , wherein a thermal gradient between the first end and a bulk material of the boule assists the one or more semiconductor substrates with separating from the boule at the damage layer in the first end of the boule.

10. The method of claim 8 , wherein the damage layer is created through laser irradiation.

11. The method of claim 8 , further comprising creating a second damage layer in a second end of the boule.

12. The method of claim 11 , wherein a thermal gradient between the second end and a bulk material of the boule assists the one or more semiconductor substrates with separating from the boule at the damage layer in the second end of the boule.

13. The method of claim 8 , wherein cooling the boule further comprises contacting the boule with liquid nitrogen.

14. The method of claim 8 , wherein heating the boule comprises using a furnace or heated bath.

15. A method of separating a wafer from a boule of silicon carbide, the method comprising:

one of cooling or heating a boule of silicon carbide;

creating a damage layer in at least a first end of the boule;

creating a second damage layer in a second end of the boule;

creating a thermal gradient between the first end and a bulk material of the boule; and

separating a silicon carbide wafer from the boule at the damage layer.

16. The method of claim 15 , wherein heating the boule comprises using a furnace or heated bath.

17. The method of claim 15 , wherein cooling the boule further comprises contacting the boule with liquid nitrogen.

18. The method of claim 15 , wherein the thermal gradient between the second end and a bulk material of the boule assists a silicon carbide wafer with separating from the boule at the damage layer in the second end of the boule.

19. The method of claim 15 , wherein the thermal gradient between the first end and the bulk material of the boule assists a silicon carbide wafer with separating from the boule at the damage layer in the first end of the boule.

20. The method of claim 1 , wherein the damage layer is created from a source different from a source used to heat the bulk material of the boule.

Assignments (4)
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 Jul 13, 2023
From: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC; GTAT CORPORATION
To: JPMORGAN CHASE BANK, N.A.
Reel/Frame 064271/0971 →
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 8, 2020
From: SEDDON, MICHAEL J.
To: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
Reel/Frame 053716/0019 →
Continuity (3)
Continuation In Part 16581964 · Sep 25, 2019
Continuation 15994864 · May 31, 2018
Related Publication 20200411380A1 · Dec 31, 2020