Electronic part unit or assembly having a plurality of electronic parts enclosed within a metal enclosure member mounted on a wiring layer

摘要

An electronic part unit which is superior in heat radiation and airtightness. The electronic part unit comprises a unit circuit board having a wiring pattern formed on a surface thereof, an electronic part mounted on the wiring pattern of the unit circuit board, a resin enclosure member for covering over a surface of the wiring pattern of the unit circuit board with the electronic part partially exposed outside, and a metal enclosure member for covering over the exposed portion of the electronic part, a surface of the resin enclosure member and the unit circuit board. The unit circuit board has a metal pad formed integrally over the entire periphery on the surface in the proximity of the outer periphery thereof, and the metal enclosure member is joined integrally to the metal pad.