COMPOSITE OF METAL MEMBER AND RESIN MOLD, AND METAL MEMBER FOR FORMING COMPOSITE WITH RESIN MOLD

摘要

Provided are a composite of a metal member and a resin mold, whereby high airtightness can be obtained and excellent adhesion between the metal and the resin can be realized even in a high-temperature usage environment, and a metal member suitable for forming the composite. This composite (1) is characterized by including a metal member (20) and a resin mold (30) formed so as to be bonded to the surface of the metal member (20), the metal member (20) having a roughened portion (21) in a bonded section (40) of the surface thereof bonded with the resin mold (30), the average volume ratio of gaps between the roughened portion (21) and the resin mold (30) in a specific interface region (43) including a bonded interface (41) between the roughened portion (21) and the resin mold (30) being 0.05 µm3 per 1 µm3 of a flat surface substantially parallel to the bonded interface (41), and the maximum dimension of the gaps being 1000 µm or less.