Patent ID: 6413801
Filing Date: 2002-07-02
Classification: B29C,H01L

Abstract:
A method of molding a semiconductor device comprising a substrate supporting a plurality of semiconductor chips electrically connected to the substrate, the molding method comprising the steps of:providing a molding material; providing a molding die having a pot for storing molding material, a molding portion with a cavity for accepting the semiconductor device, and an air vent connected to the cavity and formed so as to prevent overflowing of the molding material therethrough; a gate; and a runner having one end connected to the pot and the other end connected to the cavity through the gate, the cavity defined by a base and a side wall extending from the base; closing and clamping the molding die with the semiconductor chips are positioned in the cavity so as to maintain the side wall of the cavity at a distance from a semiconductor chip farthest from the gate at least equal to half of a longitudinal dimension of the farthest semiconductor chip, whereby a space is defined between the farthest chip and the side wall of the cavity based on the distance; feeding the molding material into the cavity such that the molding material flows into the cavity and then into the space through the channel whereby air in the cavity is vented out through the space and the air vent while preventing overflowing of the molding material through the air vent; hardening the molding material; and unclamping and opening the molding die to take out the molded product.