and 2 5 parts by weight 0 010 mole of 1 3 bis 3 aminopropyl 1 1 3 3 tetramethyl disiloxane subsequently 21 3 parts by weight 0 105 mole of terephthaloyl chloride dissolved in 100 parts by weight of cyclohexanone was dropped into the solution at a temperature of u2212 10 u00b0 to u2212 15 u00b0 c over 30 minutes and the resulting mixture was then stirred at room temperature for 4 hours to complete the reaction the reaction mixture was filtered and thereafter the solution was poured into water to precipitate the objective polymer b represented by the following formula b the precipitates were collected by filtration sufficiently washed with water and then dried at 80 u00b0 c in a vacuum for a whole day and night in 200 parts by weight of nmp were dissolved 100 parts by weight of the synthesized polyamide b and 25 parts by weight of the same diazoquinone compound d as used in example 1 and thereafter the resulting solution was filtered through a teflon filter of 0 2 u03bcm to obtain a photosensitive resin composition under the same conditions as in example 1 spin coating prebaking and exposure were conducted thereafter development was effected with a developer consisting of 1 20 parts by weight of tetramethylammonium hydroxide 93.