1. S Pyatt Dummy module with copper on glass sensor An adhesive tape has been identified that is suitable for dummy module building. This tape can be stuck on to the glass sensor for wire bonding practice.

2. S Pyatt Pull test results of copper tape Average g9.65025 St Dev g0.445028 This was initially done to demonstrate to Sam that wire bonding on copper doesn’t work. But it does work!

3. S Pyatt Contacted manufacturer of the tape Jerry Young, Applications head at Chomerics, spoke to me on the phone. Tape is high purity annealed and rolled copper. There is nothing on the surface to protect the copper! This tape has been sitting on a shelf in the clean room for a few years and belongs to Astro Space Research. This self adhesive tape is stuck down on the glass dummy Sensor and the BJ820 is programmed for Hybrid to Sensor wire bonding.

4. S Pyatt Wire bonding trials (ASIC to copper tape)

5. S Pyatt Wire bonding trials

6. S Pyatt Completed 4 layer loops

7. S Pyatt Completed 4 layer loops

8. S Pyatt Good quality bonds on the copper

9. S Pyatt Good quality bonds on the PGA

10. S Pyatt However there are intermittent bond failures on the PGA. Maybe around 3 percent.

11. S Pyatt Copper tape wire bonds well. Intermittent wire bond failures on Pattern Glass ASIC. BJ820 checked, nothing to raise any alarms. Contacted Bart who suggests what I’m seeing on the PGA is not unusual. Copper tape appears to work. This is a cheap, easy method of making a dummy wire bondable sensor using the glass sensors. Useful for gaining module wire bonding experience.

12. S Pyatt This tape is available from Farnell This appears to be the same tape.

13. S Pyatt And the next material to try is: