Preparation of Two-Component Additional Silicone Gel for IGBT
Two-component additional silicone gel was prepared by vinyl-terminated methyl silicone oil as the base polymer,and hydrogen silicone oil,platinum catalyst,inhibitor.The effects of the ratio of end side vinyl silicone oil,end side hydrogen silicone oil,mono vinyl-terminated methyl silicone oil,active hydrogen and vinyl substance on the curing of silicone gel were in-vestigated,and the properties were compared with those of imported products.The results show that the optimum conditions for preparing silicone gel for insulated gate bipolar transistor(IGBT)packaging were that no end side vinyl silicone oil.The amount of end hydrogen silicone oil is 15 wt％,9.47 wt％of monovinyl terminated methyl silicone oil in the system,with active hydro-gen to vinyl(ratio of 0.95).The silicone gel prepared is equivalent to the imported products,and it performs well in terms of high and low temperature aging resistance,85℃/85％RH aging performance,repair ability,electrical performance.The oil per-meability meets the requirements of silicone gel for IGBT packaging.
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