| 摘要 |
PROBLEM TO BE SOLVED: To prevent adhesive from projecting by forming a plurality of nonpenetrating recesses at least along the fringe part of an opening in the bonding face of one member. SOLUTION: A plurality of nonpenetrating recesses 51, 51,... comprising thin trenches are made along the fringe part of an opening 42 in the bonding face of one member 41. Nonpenetrating recesses 52, 52,... are also made in other region. The nonpenetrating recesses 51 made along the fringe part of an opening 42 substantially surrounds the opening 42 of one member 41. Three nonpenetrating recesses 51 are made in the barrier wall 45 between the opening 42 of one member 41. Since excess adhesive flows into the nonpenetrating recesses 51 when one member 41 is bonded to the other member, projection of the adhesive into the opening 42 of one member 41 is reduced.
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