High yield substrate assembly
View Patent ↗High yield substrate assembly. In accordance with a first method embodiment, a plurality of piggyback substrates are attached to a carrier substrate. The edges of the plurality of the piggyback substrates are bonded to one another. The plurality of piggyback substrates are removed from the carrier substrate to form a substrate assembly. The substrate assembly is processed to produce a plurality of integrated circuit devices on the substrate assembly. The processing may use manufacturing equipment designed to process wafers larger than individual instances of the plurality of piggyback substrates.
1. A method comprising:
attaching a plurality of piggyback substrates to a carrier substrate, wherein a length and a width extent of said piggyback substrates are substantially greater than a thickness extent of said piggyback substrates;
bonding edges of said plurality of said piggyback substrates to one another;
removing at least one of said plurality of piggyback substrates from said carrier substrate to form a substrate assembly;
processing said substrate assembly to produce a plurality of integrated circuit devices on said substrate assembly; and
removing said substrate assembly from said plurality of integrated circuit devices to form a reusable substrate assembly.
2. The method of claim 1 wherein said processing uses manufacturing equipment designed to process wafers larger than individual instances of said plurality of piggyback substrates.
3. The method of claim 1 wherein said carrier substrate is rectangular.
4. The method of claim 1 wherein said plurality of piggyback substrates comprises a parallelogrammatic substrate.
5. The method of claim 1 wherein said plurality of piggyback substrates comprises a substrate with a curved edge.
6. The method of claim 1 wherein said bonding comprises adding a material to gaps between said plurality of piggyback substrates.
7. The method of claim 6 wherein said bonding further comprises heating said material to form a covalent bond.
8. The method of claim 6 wherein said material is characterized as having similar optical properties to those of said plurality of piggyback substrates.
9. The method of claim 6 wherein said material comprises aluminum oxide nano particles.
10. The method of claim 6 wherein said material comprises aluminum (AlON).
11. The method of claim 6 wherein said material comprises a nickel-cobalt ferrous alloy.
12. The method of claim 1 wherein said plurality of piggyback substrates are not substantially silicon substrates.
13. The method of claim 1 wherein said plurality of piggyback substrates are from the set of substrates comprising sapphire (α-Al2O3), Gallium Nitride (GaN), Gallium Arsenide (GaAs), Gallium Phosphide (GaP), Lithium Tantalate (LiTaO3), Lithium Niobate (LiNb03), Indium Arsenide (InAs), Indium Phosphide (InP), Silicon Carbide (SiC), and Germanium (Ge).
14. The method of claim 1 wherein said plurality of integrated circuit devices comprise a light emitting diode.
15. The method of claim 1 wherein said removing said substrate assembly comprises a laser lift off process.
16. The method of claim 1 further comprising:
processing said reusable substrate assembly to produce a plurality of integrated circuit devices on said reuseable substrate assembly.
17. The method of claim 1 wherein said substrate assembly has a width or diameter of 200 mm or greater.
18. The method of claim 1 wherein said substrate assembly is rectangular.
19. The method of claim 1 wherein bonds between said plurality of said piggyback substrates comprise nano particles.