Method for manufacturing a semiconductor integrated circuit device

A method for manufacturing a semiconductor integrated circuit device, comprising the steps of:

• (a) setting to a molding die a lead frame having a plurality of unit device regions and with a semiconductor chip being fixed in each of the unit device regions, and sealing the semiconductor chip with sealing resin to form a resin sealing body in each of the unit device regions, each of the unit device regions comprising:
• (i) a generally quadrangular die pad with the semiconductor chip fixed thereto;
• (ii) a plurality of leads extending from the exterior of each side of the die pad so as to form a plane almost flush with a bottom of the resin sealing body and projecting from each of side faces of the resin sealing body;
• (iii) a tie bar for coupling the vicinities of outer end portions of the leads;
• and (iv) lead-to-lead resin projecting portions each filling between adjacent ones of the leads and projecting from the side faces of the resin sealing body;
• (b) after the step (a), radiating laser light to the lead-to-lead resin projecting portions in each of the unit device regions to remove the lead-to-lead resin projecting portions;
• (c) after the step (b), forming solder layers over exposed surfaces respectively of the leads in each of the unit device regions;
• and
• (d) after the step (c), cutting the external end portions of the leads in each of the unit device regions, thereby separating the leads and the tie bar from each other on each side of the resin sealing body and cutting and separating the resin sealing body from the lead frame.