IP Library Granted Patent US 11,852,835
Granted Patent B2
US 11,852,835 · App. 18/062,409 · Granted Dec 26, 2023

Artificial reality system having system-on-a-chip (soc) integrated circuit components including stacked sram

Inventor: Rajendra D. Pendse (Fremont, CA)
Assignee: Meta Platforms Technologies, LLC
G02B27/0176G06T19/006H10B10/00
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Quick Facts
Patent No.
US 11,852,835
App. No.
18/062,409
Granted
Dec 26, 2023
Kind
B2
Abstract

Three-dimensional integrated circuit component(s) are described including a System-on-a-Chip (SoC) die and a separate static random-access memory (SRAM) subcomponent in a vertically stacked arrangement. Such stacked SoC/SRAM integrated circuit components may form part of a system to render artificial reality images.

Claims (33)

1. An artificial reality system comprising:

a head mounted display (HMD) configured to output artificial reality content, the HMD including at least one stacked integrated circuit component, wherein the at least one stacked integrated circuit component comprises:

a system-on-a-chip (SoC) die having a frontside and a backside, wherein the frontside of the SoC die includes a functional area including one or more active circuitry elements and one or more Input/Output (I/O) pads, and wherein the frontside of the SoC die further includes at least one non-functional area outside of the functional area; and

a static random-access memory (SRAM) subcomponent having a frontside and a backside, wherein the frontside of the SRAM subcomponent includes a functional area including one or more active circuitry elements and one or more I/O pads bonded to the one or more I/O pads of the SoC die in a face-to-face arrangement with no intermediate redistribution layer (RDL) routing.

2. The artificial reality system of claim 1 , wherein the at least one non-functional area is located around the periphery of the functional area.

3. The artificial reality system of claim 1 , further comprising a plurality of through-silicon vias (TSVs) formed from the backside of the SoC die to the frontside of the SoC die, wherein the plurality of TSVs are formed in the at least one non-functional area of the SoC die and wherein none of the plurality of the TSVs are formed within the functional area of the SoC die.

4. The artificial reality system of claim 1 , further comprising a plurality of conductive bumps patterned on the backside of the SoC die.

5. The artificial reality system of claim 1 , further comprising RDLs patterned on the backside of the SoC die.

6. The artificial reality system of claim 1 , further comprising:

a plurality of sensors configured to output motion data representative of motion of a user;

wherein the SoC processes the motion data representative of motion of a user received from one or more of the plurality of sensors.

7. The artificial reality system of claim 6 , wherein the plurality of sensors includes at least one inertial measurement unit.

8. The artificial reality system of claim 1 , further comprising:

one or more image capture devices configured to output image data representative of a physical environment corresponding to a viewing perspective of the HMD;

wherein the SoC processes the image data representative of the physical environment received from one or more of the image capture devices.

9. The artificial reality system of claim 1 , wherein the SRAM subcomponent includes a single SRAM die.

10. The artificial reality system of claim 1 , wherein the SRAM subcomponent includes a stack of multiple SRAM die.

11. An integrated circuit component comprising:

a system-on-a-chip (SoC) die having a frontside and a backside, wherein the frontside of the SoC die includes a functional area including one or more active circuitry elements and one or more Input/Output (I/O) pads, and wherein the frontside of the SoC die further includes at least one non-functional area outside of the functional area; and

a static random-access memory (SRAM) subcomponent having a frontside and a backside, wherein the frontside of the SRAM subcomponent includes a functional area including one or more active circuitry elements and one or more I/O pads bonded to the one or more I/O pads of the SoC die in a face-to-face arrangement with no intermediate redistribution layer (RDL) routing.

12. The integrated circuit component of claim 11 , wherein the at least one non-functional area is located around the periphery of the functional area.

13. The integrated circuit component of claim 11 , further comprising a plurality of through-silicon vias (TSVs) formed from the backside of the SoC die to the frontside of the SoC die, wherein the plurality of TSVs are formed in the at least one non-functional area of the of the SoC die and wherein none of the plurality of the TSVs are formed within the functional area of the SoC die.

14. The integrated circuit component of claim 11 , further comprising a plurality of solder bumps patterned on the backside of the SoC die.

15. The integrated circuit component of claim 11 , further comprising RDLs patterned on the backside of the SoC die.

16. The integrated circuit component of claim 11 , wherein the SRAM subcomponent includes a single SRAM die.

17. The integrated circuit component of claim 11 , wherein the SRAM subcomponent includes a stack of multiple SRAM die.

18. A method comprising:

providing a system-on-a-chip (SoC) die having a frontside and an oppositely facing backside; and

bonding one or more Input/Output (I/O) pads on the frontside of the SoC die to one or more I/O pads on a frontside of a static random-access memory (SRAM) subcomponent in a face-to-face, vertically stacked arrangement with no intermediate redistribution (RDL) routing, wherein the frontside of the SoC die includes a functional area including one or more active circuitry elements, and wherein the frontside of the SoC die further includes at least one non-functional area outside of the functional area.

19. The method of claim 18 , further comprising thinning the SoC die from a first thickness to a second thickness, wherein the first thickness is relatively greater than the second thickness, and wherein the thinning includes thinning the SoC die from the backside of the SoC die.

20. The method of claim 18 , further comprising:

forming a plurality of through-silicon vias (TSVs) from the backside of the SoC die to the frontside of the SoC die, wherein the plurality of TSVs are formed in the at least one non-functional area of the SoC die and wherein none of the plurality of the TSVs are formed within the functional area of the SoC die; and

metallizing the TSVs from the backside of the SoC die to the frontside of the SoC die.

Assignments (3)
CORRECTIVE ASSIGNMENT TO CORRECT THE THE ASSIGNEE NAME PREVIOUSLY RECORDED AT REEL: 065494 FRAME: 0487. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Recorded Nov 15, 2023
From: PENDSE, RAJENDRA D., DR.
To: FACEBOOK TECHNOLOGIES, LLC
Reel/Frame 065584/0460 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 8, 2023
From: PENDSE, RAJENDRA D.
To: META PLATFORMS TECHNOLOGIES, LLC
Reel/Frame 065494/0487 →
CHANGE OF NAME Recorded Nov 8, 2023
From: FACEBOOK TECHNOLOGIES, LLC
To: META PLATFORMS TECHNOLOGIES, LLC
Reel/Frame 065515/0949 →
Continuity (2)
Continuation 16910792 · Jun 24, 2020
Related Publication 20230094261A1 · Mar 30, 2023