| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve a problem that bonding strength is insufficient between a printed board and a reflector or a lens and they are separated easily. <P>SOLUTION: In a light emitting diode where an LED chip 4 is mounted on a printed board 1 and a reflector 8 is bonded onto the printed board 1 mounting the LED chip 4, a part for enlarging the bonding area is formed on the bonding surface 6 of the printed board 1 and the reflector 8. The part for enlarging the bonding area is a hole 7 (groove, recess) formed in a part of the bonding surface 6 on the printed board 1. Alternatively, a rough surface is formed on the bonding surface of the reflector 8 and the LED chip 4 in addition to the hole 7. Adhesive 9 applied to the bonding surface 6 flows into the part for enlarging the bonding area thus increasing bonding strength between the printed board 1 and the reflector 8. Consequently, side pressure strength is enhanced and prevention of stripping can be expected at the time of falling of a product. It is also true in case of a lens instead of the reflector. <P>COPYRIGHT: (C)2007,JPO&INPIT |
