[High-tech LED News] Tanaka Electronics Industry began selling silver bond wire "SEA". When the lead diameter is 25 μm, the cost of the precious metal raw material can be reduced by about 80% as compared with the conventional gold bonded wire.
Due to the high gold market, semiconductor manufacturers are introducing copper bond wires that reduce the cost of precious metal materials by about 90%. However, Tanaka Electronics said that copper bond wires are relatively hard, and in addition to possibly damaging the aluminum electrodes on the chip, there is a problem that it is necessary to use a hydrogen-nitrogen mixed gas that is difficult to maintain safety and cost.
This time, Tanaka Electronics Co., Ltd. developed the "silver alloy containing the best metal" to make it as soft as the gold bond wire, and it can use only the silver bonding wire of nitrogen. It is said that it can be sufficiently joined under substantially the same conditions as the gold lead.
As another feature of SEA, Tanaka Electronics also pointed out that in the important short-wavelength field of LEDs for illumination (450-495 nm), the reflectance of light is as high as 80%. It is 50% higher than the gold lead and is therefore suitable for the production of high-brightness LEDs.
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