Method of making electrode array with a tack opening

1. A method of making a flexible circuit electrode array comprising:

depositing a polymer base layer;

depositing metal on said polymer base layer;

patterning said metal to form metal traces;

depositing a polymer top layer on said polymer base layer and said metal traces;

preparing at least one tack opening; and

heating said flexible circuit electrode array in a mold to form a three dimensional shape in said flexible circuit electrode array.

2. The method according to claim 1 , comprising preparing at least one cutout in the vicinity of the tack opening.

3. The method according to claim 1 , wherein the tack opening is made thinner and has an increased open angle.

4. The method according to claim 1 , wherein the tack opening is surrounded by a flat or hemisphere shaped membrane.

5. The method according to claim 1 , wherein the tack opening is surrounded and partially covered by a pedestal.

6. The method according to claim 1 , wherein the pedestal is prepared by applying at least one soft polymer.

7. The method according to claim 6 , wherein the pedestal is prepared by applying silicone or mixtures thereof with other soft polymers.