Patent ID: 6767767
Filing Date: 2004-07-27
Classification: H01L,Y10T

Abstract:
A method of manufacturing a semiconductor device, comprising the steps of:providing a substrate, the substrate having a plurality of product forming areas arranged regularly on a main surface thereof and also having wiring lines formed on main surfaces and back surfaces opposite thereto of the product forming areas, the wiring lines on the main surfaces and the wiring lines on the back surfaces being electrically connected with each other through conductors which extend through the substrate from the main surfaces to the back surfaces; fixing semiconductor chips respectively to the product forming areas on the main surface of the substrate and connecting electrodes formed on upper surfaces of the semiconductor chips with the wiring lines formed on the main surface of the substrate electrically using electrically conductive connecting means; clamping the substrate between a lower mold and an upper mold of a molding die in transfer molding equipment to form a cavity on the main surface side of the substrate, as well as gates and air vents connected to the cavity, then feeding molten insulating resin into the cavity through the gates and at the same time forcing out air present within the cavity to the exterior of the cavity through the air vents to form a block molding package on the main surface side of the substrate, the block molding package being formed of a single resin and covering the semiconductor chips and the connecting means; and dividing the substrate and the block molding package, which are superimposed one on the other, longitudinally and transversely at predetermined positions to form plural semiconductor devices, wherein grooves reaching an edge of the substrate are partially formed in a peripheral edge portion of the substrate so that the grooves form the air vents when the substrate is clamped between the lower and upper molds of the molding die.