Method of testing circuit elements on a semiconductor wafer
View Patent ↗A semiconductor device test apparatus according to the present invention includes a circuit board 103 and a film 105 . A plurality of electrodes 103 c are formed at the circuit board 103 at positions that face opposite a plurality of electrodes 201 a at a device to be measured 201 , whereas bumps 105 b are formed at the surface of the film 105 located toward the device to be measured 201 , at positions that face opposite the plurality of electrodes 201 a at the device to be measured 201 and electrodes 105 c are formed at the surface of the film 105 located toward the circuit board 103 at positions that face opposite the plurality of electrodes 103 c at the circuit board 103 . The bumps 105 b formed at one surface of the film 105 and the electrodes 105 c formed at another surface of the film 105 are electrically connected with each other via through holes 105 d to support semiconductor devices having electrodes provided at a fine pitch and to improve durability.
1. A method of testing circuit elements on a semiconductor wafer, the method comprising:
providing said semiconductor wafer of which a wafer surface is coated with a resin,
wherein the wafer surface has a plurality of electrodes formed thereon and connected to the circuit elements, and
wherein the resin is to form an outer layer of packaged semiconductor devices formed by dividing the resin-coated semiconductor wafer, the resin leaving exposed the electrodes;
inserting the semiconductor wafer into a burn-in apparatus;
performing a burn-in process with the semiconductor wafer mounted in the burn-in apparatus on a circuit board via an elastic sheet; and
testing the circuit elements of the semiconductor wafer for electrical functions in the burn-in apparatus through the electrodes during the burn-in process.
2. The method of testing circuit elements on a semiconductor wafer according to claim 1 , wherein the semiconductor wafer is exposed to convective air in the burn-in apparatus.
3. The method of testing circuit elements on a semiconductor wafer according to claim 1 , wherein a pitch of the electrodes is equal to or less than 0.5 mm.
4. The method of testing circuit elements on a semiconductor wafer according to claim 1 , wherein the semiconductor wafer is mounted on the circuit board via a film.
5. The method of testing circuit elements on a semiconductor wafer according to claim 1 , wherein the semiconductor wafer and the circuit board are fixed by a positioning plate.
6. The method of testing circuit elements on a semiconductor wafer according to claim 1 , wherein the semiconductor wafer is fixed by a holding plate.
7. The method of testing circuit elements on a semiconductor wafer according to claim 6 , wherein the holding plate has a plurality of through holes.