In-Vehicle Electronic Module

摘要

There is a problem that contact resistance increases due to formation of an oxide film on a contact interface or biting of abrasion powder caused by micro-sliding when a contact connecting portion of a connection terminal including non-noble metal members is exposed to high temperature environment or a repetitious temperature cycle. An object of the present invention is to provide an in-vehicle electronic module that has connection reliability equivalent to that of the conventional in-vehicle electronic module even when being placed in the environment of an engine compartment and can achieve cost reduction by reducing the number of parts and assembly steps. The electronic module includes a mounting board having a circuit board on which an electronic component is mounted, and a case member for accommodating and protecting the mounting board from surrounding environment, The electronic module has a connection structure in which a portion of the circuit board is protruded to the outside through an opening of the case and inserts a board terminal into an external female connector to obtain electrical continuity, and a portion of the case member forms a connector housing that receives the female connector and isolates a space in which the board terminal is present from surrounding environment and an insulating resin member for fixing the circuit board in the case is integrally molded or joined with the circuit board.

主权项

1. An in-vehicle electronic module, comprising:
a circuit board on which an electronic component is mounted; a box type case or a protective member made of mold resin that accommodates and protects the circuit board from surrounding environment; and a connector accommodating member that is integrally formed with the protective member and has an opening space for accommodating a mating connector, wherein the in-vehicle electronic module has a connection structure in which an end portion of the circuit board on which the electronic component is not mounted is protruded from the protective member to the opening space of the connector accommodating member and the end portion of the board is inserted into the mating connector to obtain electrical continuity, and a connection terminal of the board has a structure of Cu wiring/Cu—Sn reaction layer/Sn-based alloy layer containing an Ag—Sn intermetallic compound.