Abstract
In this paper we investigate and compare a laser-driven joining process with two different illumination conditions: (i) high speed scanning of a focused beam and (ii) reasonably uniform "flood illumination" of the whole sample. It is shown that the scanning beam not only avoids illuminating the central part of the device, but also provides more uniform heating of the area to be bonded than laser "flood illumination". We demonstrate bonding of three different packages: (i) LCC (Leadless chip carrier) packages, (ii) AlN and (iii) LTCC (Low temperature co-fired ceramic) substrates to "top-hat" packages, using a scanned beam from a fibre-delivered high power laser diode array to cure an intermediate layer of glass frit. Standard leak testing demonstrates that all those samples have excellent hermetic sealing with leak rates at the level of 10-9 atm.cc/s.
Original language | English |
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Title of host publication | ICALEO 2008 - 27th International Congress on Applications of Lasers and Electro-Optics, Congress Proceedings |
Pages | 122-131 |
Number of pages | 10 |
Publication status | Published - 2008 |
Event | ICALEO 2008 - 27th International Congress on Applications of Lasers and Electro-Optics - Temecula, CA, United States Duration: 20 Oct 2008 → 23 Oct 2008 |
Conference
Conference | ICALEO 2008 - 27th International Congress on Applications of Lasers and Electro-Optics |
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Country/Territory | United States |
City | Temecula, CA |
Period | 20/10/08 → 23/10/08 |
Keywords
- Glass frit
- Laser joining