Target and method of diffusion bonding target to backing plate
First Claim
1. A sputter target assembly comprising:
- a target comprised of a first material and having a mating surface;
an interlayer comprised of a second material;
a backing plate comprised of a third material and having a mating surface, wherein the interlayer is intermetallically diffusion bonded with the mating surfaces of the target and backing plate during a HIP process.
1 Assignment
0 Petitions
Accused Products
Abstract
Sputter target assemblies (10) and methods of making the sputter target assemblies in which the HIP processes conventionally used are minimized, or eliminated, while producing higher yields of sputter target assemblies in less time. In one instance the sputter target assemblies include a single, or multiple, layered interlayer (14, 16) between the target and backing plate (18) in order to achieve intermetallic diffusion bonds between adjacent layers during a single HIP process. A mechanical interlock between the target (12) and backing plate is also achieved preferably during a single HIP process. In another instance, the target and backing plate are welded directly together by electron beam welding, and the interlayer and HIP process are omitted. In either case, the process for making the sputter target assembly is shortened, rendering it less expensive and subject to less failures, while achieving assemblies having robust strength.
36 Citations
40 Claims
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1. A sputter target assembly comprising:
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a target comprised of a first material and having a mating surface;
an interlayer comprised of a second material;
a backing plate comprised of a third material and having a mating surface, wherein the interlayer is intermetallically diffusion bonded with the mating surfaces of the target and backing plate during a HIP process. - View Dependent Claims (2, 3, 4, 5, 6)
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7-11. -11. (canceled)
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12. A method of making a sputter target assembly comprising:
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a. providing a target comprised of a first material and having a mating surface;
b. providing an interlayer comprised of a second material adjacent the mating surface of the target;
c. providing a backing plate comprised of a third material and having a mating surface, the mating surface of the backing plate being adjacent the interlayer;
d. placing the adjacent target, interlayer, and backing plate assembly into a HIP can and subjecting the assembly to a HIP process;
e. forming intermetallic diffusion bonds between the adjacent layers, wherein the interlayer diffusion bonds to the target and the backing plate; and
f. removing the assembly from the HIP can. - View Dependent Claims (13, 14, 15)
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- 16. (canceled)
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18-22. -22. (canceled)
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23. A sputter target assembly comprising:
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a target comprised of a first material and a mating surface;
an interlayer comprised of a second material;
a backing plate comprised of a third material and a mating surface, wherein the interlayer is intermetallically diffusion bonded with the mating surfaces of the target and backing plate and the target and backing plate are mechanically interlocked during a HIP process. - View Dependent Claims (24, 25, 26, 27, 28, 29, 31)
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30. (canceled)
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32-36. -36. (canceled)
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37. A method of making a sputter target assembly comprising:
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a. providing a target comprised of a first material and having a mating surface;
b. providing an interlayer comprised of a second material adjacent the mating surface of the target;
c. providing a backing plate comprised of a third material and having a mating surface, the mating surface of the backing plate being adjacent the interlayer;
d. placing the adjacent target, interlayer, and backing plate assembly into a HIP can and subjecting the assembly to a HIP process;
e. forming intermetallic diffusion bonds between the adjacent layers;
f. forming a mechanical interlock between the target and backing plate, wherein the interlayer diffusion bonds to the target and the backing plate; and
g. removing the assembly from the HIP can. - View Dependent Claims (38, 39)
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40-58. -58. (canceled)
Specification