System and Method for Assembling a Microthermoelectric Device

• US 20090090409A1
• Filed: 09/26/2008
• Published: 04/09/2009
• Est. Priority Date: 10/05/2007
• Status: Abandoned Application

• Current Assignee: Marlow Industries, Inc. (Coherent Corp.)
• Original Assignee: Marlow Industries, Inc. (Coherent Corp.)
• Inventors: Moczygemba, Joshua E.
• Application Number:
  US12/239,077
• Publication Number:
  US 20090090409A1
• Time in Patent Office: Days
• US Class Current: 136/201
• CPC Class Codes: H10N 10/01 Manufacture or treatment
• CPC Class Codes: H10N 10/17 characterised by the structure or configuration of the cell or thermocouple forming the device

Abstract

A method for creating an array of thermoelectric elements may include providing a rigid block including P-type material layers and N-type material layers stacked in an alternating relationship and bonded together by an adhesive. First channels may be formed in the block parallel to the P-type material layers and the N-type material layers and may partially extend through a depth of the block leaving an uncut bottom on the block. The first channels may be filled with an electrically and thermally insulating material and second channels may be formed in the block, transverse to the first channels. The second channels may partially extend through the depth of the block. The second channels may be filled with the electrically and thermally insulating material and the uncut bottom may be removed from the block.

Claims

1. A method for creating an array of thermoelectric elements, comprising:

providing a rigid block including P-type material layers and N-type material layers stacked in an alternating relationship and bonded together by an adhesive;

forming first channels in the block parallel to the P-type material layers and the N-type material layers, the first channels partially extending through a depth of the block leaving an uncut bottom on the block;

filling the first channels with an electrically and thermally insulating material;

forming second channels in the block transverse to the first channels, the second channels partially extending through the depth of the block;

filling the second channels with the electrically and thermally insulating material; and

removing the uncut bottom from the block.

2. The method of claim 1, wherein providing a rigid block comprises:

providing P-type wafers and N-type wafers;

applying the adhesive to the P-type wafers and N-type wafers;

stacking the P-type wafers and N-type wafers in an alternating relationship;

pressing the P-type wafers and N-type wafers together to decrease widths of the bond lines between the P-type wafers and N-type wafers;

curing the adhesive to form a P/N-type ingot;

cutting the rigid block from the P/N-type ingot.

3. The method of claim 2, further comprising, before curing the adhesive, removing any excess adhesive that is squeezed out of the bond lines when the P-type and N-type wafers are pressed together.

4. The method of claim 1, wherein slicing the first channels in the block parallel to the P-type material layers and the N-type material layers comprises slicing the first channels between the P-type material layers and the N-type material layers.

5. The method of claim 1, wherein removing the uncut bottom from the block comprises:

forming a P/N-type array by removing the uncut bottom from the block, the P/N-type array comprising P-type elements and N-type elements separated by lines of the electrically and thermally insulating material.

6. The method of claim 5, further comprising applying electrical interconnects to the P/N-type array, the electrical interconnects electrically coupling at least one P-type element to at least one N-type element.

7. The method of claim 5, further comprising trimming the array to include a desired number of the P-type elements and N-type elements.

8. The method of claim 5, wherein each element of the P-type elements and N-type elements is approximately uniform in dimension to every other element of the P-type elements and N-type elements.

9. The method of claim 1, wherein:

each channel of the first channels is approximately uniform in dimension to every other channel of the first channels; and

each channel of the second channels is approximately uniform in dimension to every other channel of the second channels.

10. The method of claim 1, wherein:

the first channels traverse a length of the block, the length measured parallel to the P-type material layers and N-type material layers;

the second channels traverse a width of the block, the width measured perpendicular to the P-type material layers and N-type material layers;

the first channels intersect the second channels; and

a depth of the first channels is equal to a depth of the second channels.

11. The method of claim 1, wherein:

the first channels are sliced along bond lines between the P-type material layers and N-type material layers, the channels forming N-type fins and P-type fins; and

the first channels are sliced such that a width of each fin of the N-type fins and P-type fins approximately matches a width of every other fin of the N-type fins and P-type fins.

12. The method of claim 11, wherein the first channels remove the adhesive from between the N-type fins and the P-type fins.

13. The method of claim 1, wherein:

the second channels form P/N-type fins comprising both P-type material and N-type material; and

the second channels are sliced such that a width of each fin of the P/N-type fins matches a width of every other fin of the P/N-type fins.

14. The method of claim 1, wherein each of the first channels is defined by a P-type material layer on a first side and an N-type material layer on a second side and the uncut bottom on a third side.

15. The method of claim 1, wherein the first channels are perpendicular to the second channels.

16. A method for creating an array of thermoelectric elements, comprising:

providing P-type wafers and N-type wafers;

applying the adhesive to the P-type wafers and N-type wafers;

stacking the P-type wafers and N-type wafers in an alternating relationship;

pressing the P-type wafers and N-type wafers together to decrease widths of the bond lines between the P-type wafers and N-type wafers;

curing the adhesive to form a P/N-type ingot;

cutting a rigid block from the P/N-type ingot including P-type material layers and N-type material layers stacked in an alternating relationship and bonded together by the adhesive; and

creating an array P-type elements and N-type elements from the rigid block.

17. The method of claim 16, further comprising, before curing the adhesive, removing any excess adhesive that is squeezed out of the bond lines when the P-type and N-type wafers are pressed together.

18. The method of claim 16, wherein each element of the P-type elements and N-type elements is approximately uniform in dimension to every other element of the P-type elements and N-type elements.

19. The method of claim 16, comprising pressing the P-type wafers and the N-type wafers together until the P-type wafers and the N-type wafers touch one another along the bond lines.

20. A method for creating an array of thermoelectric elements, comprising:

first, providing a rigid block including P-type material layers and N-type material layers stacked in an alternating relationship and bonded together by an adhesive;

second, forming first channels in the block parallel to the P-type material layers and the N-type material layers, the first channels partially extending through a depth of the block leaving an uncut bottom on the block;

third, filling the first channels with an electrically and thermally insulating material;

fourth, curing the electrically and thermally insulating material applied in the third step;

fifth, forming second channels in the block transverse to the first channels, the second channels partially extending through the depth of the block;

sixth, filling the second channels with the electrically and thermally insulating material;

seventh curing the electrically and thermally insulating material applied in the sixth step; and

eighth, removing the uncut bottom from the block, wherein the steps are performed in the order in which they are numbered.