| 摘要 |
PURPOSE:To improve the adhesive property of an insulative film and to prevent the film from being peeled from its square parts by a method wherein the square parts of a polygon-shaped insulative substrate or the insulative film are respectively formed into the shape of a circular arc. CONSTITUTION:An insulative film 106 is formed into a quadrangle and has independent electrode patterns 107, each consisting of a prescribed number of independent electrodes, along each side of its upper surface. Each square part 106a of the film 106 is formed into a circular arc-shaped R part 108 and the starting point position (alpha) of this R part is set at a position 150mum or more apart from the end of the pattern 107 nearest the part 106a. The film 106 formed in such a way is laminated on a die pad part 104 of a lead frame member 101 with a bonding agent or the like. The film 106 is evenly heated and pressed also in each square part 106a. As a result, the film 106 is finely bonded also on each square part 106a and stops peeling from these square parts 106a.
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