Method of making an elastomeric conductive sheet

1. A method of stressing anisotropic conductive elastomer (ACE) sheet material that defines a plurality of electrical pathways through its thickness, the sheet defining a perimeter, the method comprising:

mechanically gripping the sheet perimeter, while leaving an interior portion of the sheet free;

providing a surface over which the interior portion of the sheet is to be stretched;

contacting the sheet and the surface; and

relatively moving the sheet and the surface, to stretch the sheet over the surface, and thereby stress the interior portion of the sheet.

2. The method of claim 1 , further comprising, while the sheet is stretched, fixing at least one frame structure to the stretched sheet, such that stretched ACE materials spans the frame opening, and then removing from the sheet the frame with the spanning ACE material.

3. The method of claim 2 wherein the frame defines means for aligning the frame with a printed circuit board.

4. The method of claim 3 wherein the means for aligning comprises spaced holes through the frame, adapted to fit therethrough mechanical structures that engage with the printed circuit board.

5. The method of claim 1 wherein the mechanically gripping step comprises clamping the sheet perimeter.

6. The method of claim 5 wherein the sheet perimeter is square.

7. The method of claim 5 wherein the entire sheet perimeter is clamped.

8. The method of claim 7 wherein the free interior portion of the sheet is square.

9. The method of claim 5 wherein there is an even gap between the sheet perimeter clamp and the surface when the sheet contacts the surface.