000 and 20 000 mpa u00b7 s liquid straight chain polyorganohydrosiloxane having an r 3 3 sio 1 2 unit and an r 4 2 sio 2 2 unit an organosiloxane tackifier in which one molecule has on average at least one epoxy group a hydrosilylation catalyst of a volume enough to promote the curing of the composition the composition of the present invention and the cured semiconductor component thereof have good heat resistance good adhesiveness with aluminum having a mirror finish and ceramic substrate and good resistance to humidity application_number US 201515507238 A description in order to make the purposes technical solutions and advantages of the present invention be clearer the present invention will be further described in detail hereinafter with reference to accompany embodiments it should be understood that the specific embodiments described here are only intended to illustrate the present invention but not to limit the present invention in the following description vi refers to a vinyl group and me represents a methyl group ethyl orthosilicate 10 9 g is added into a flask absolute ethyl alcohol 30 g and concentrated hydrochloric acid having a concentration of 37 by mass 15 g are added successively and a reaction is performed at 70 u00b0 c for 5 min tetramethyldivinyltetramethyldisiloxane 1 7 g is added and refluxing is further performed for 60 min the reactants are transferred into a separatory funnel an acid layer is removed the organic layer is washed with water into a neutral ph and then transferred to a flask deionized water 1 g is added refluxing is performed at 70 u00b0 c for 60 min and the.