INJECTION MOLDED ARTICLE AND METHOD FOR PRODUCING THE SAME

To form a sealing material on a through hole so that the sealing material inhibits a conductive material with which the through hole is filled from flowing out as a result of heat and resin pressure when injecting a resin, and to thereby prevent disconnection of a conductive layer formed on both surfaces of a base sheet.SOLUTION: An injection molded article 10 comprises: a flat molded resin body 11 that has a flat rectangular parallelepiped shape and is formed from an injection molded resin; and a base sheet 40 that is fixed to a surface of the molded resin body 11. In the base sheet 40, a first conductive layer 44 is formed on a first surface 41 and a through hole 43 that passes through from the first surface 41 to a second surface 42 is formed. The through hole 43 is filled with a conductive material, and a second conductive layer 45 is formed so as to be electrically connected with the first conductive layer 44 via the conductive material with which the through hole is filled. In addition, a sealing material 46 is formed on the first conductive layer 44 so as to cover the through hole 43. The molded resin body 11 is fixed together with a first surface 41 side of the base sheet 40 so as to cover the sealing material 46.SELECTED DRAWING: Figure 1 【課題】スルーホール上に封止材を形成することで、樹脂射出時の熱や樹脂圧によって、封止材がスルーホールに充填された導電材料を流すことを抑制し、基体シートの両面に形成した導電層の断線を防ぐことを目的とする。【解決手段】射出成形品１０は、扁平な直方体形状であり、射出成形樹脂で構成された扁平な成形樹脂体１１と成形樹脂体１１の表面に固着された基体シート４０とを備えている。基体シート４０は、第１面４１に第１導電層４４と、第１面４１から第２面４２に貫通するスルーホール４３が形成されている。スルーホール４３には導電材料が充填されており、充填された導電材料を介して、第１導電層４４と電気的に接続するように第２導電層４５が形成されている。又、スルーホール４３を覆うように第１導電層４４の上に封止材４６が形成されている。成形樹脂体１１は、封止材４６を覆うように基体シート４０の第１面４１側と固着している。【選択図】図１