Patent ID: 7268439

Claim:
A semiconductor device comprising: a circuit board having an opening, said opening having an edge line to define an outer shape thereof; a semiconductor chip mounted in said opening, said semiconductor chip including at least one corner portion and a plurality of electrodes; a plurality of wiring patterns formed on said circuit board, each of said wiring patterns including a pad which is electrically connected to an associated one of said electrodes of said semiconductor chip and a conductive line elongated from said pad in a direction opposite to said semiconductor chip; and a sealing resin formed to encapsulate said semiconductor chip together with said pad and a part of said conductive line of each of said wiring patterns, said sealing resin having a molding line to define an outer shape thereof, said conductive line of each of said wiring patterns thereby crossing said molding line of said sealing resin, said molding line of said sealing resin having a corner that corresponds to said corner portion of said semiconductor chip, said sealing resin being larger in size than said opening so that said molding line positions on said circuit board beyond said edge line of said opening, wherein said wiring patterns include a first set of wiring patterns arranged near to said corner of said molding line of said sealing resin and a second set of wiring patterns arranged apart from said corner of said molding line of said sealing resin, said conductive line of each of said first set of wiring patterns obliquely crossing said molding line of said sealing resin and said conductive line of said second set of wiring patterns substantially perpendicularly crossing said molding line of said sealing resin so that respective gaps along said molding line of said sealing resin between adjacent wiring patterns among said first set of wiring patterns and respective gaps along said molding line of said sealing resin between adjacent wiring patterns among said second set of wiring patterns are approximately equal to one another.