Laser crystal components joined with thermal management devices
A method for preparing a surface of a YAG crystal for thermal bonding includes performing an ion implantation process to introduce nitrogen into a surface layer of the YAG crystal to replace depleted oxygen therein, to change surface energy of the surface layer of the YAG crystal and to provide desired bonding characteristics for the surface layer; and joining the ion implanted surface layer with a thermal management device configured to dissipate heat from the YAG crystal. Also, a micro-chip device having a YAG crystal whose surface is prepared with the above disclosed method is provided and a device for forming a metallization pattern on a surface of the YAG crystal is provided.
1. A method for preparing a surface of a YAG crystal for thermal bonding, the method comprising:
performing an ion implantation process to introduce nitrogen into a surface layer of the YAG crystal to replace depleted oxygen therein, to change surface energy of the surface layer of the YAG crystal and to provide desired bonding characteristics for the surface layer; and
joining the ion implanted surface layer with a thermal management device configured to dissipate heat from the YAG crystal.
2. The method of claim 1 , further comprising metallizing the ion implanted surface layer, wherein the metallizing is performed before said joining the ion implanted surface layer with the thermal management device, wherein the ion implanted surface layer provides desired wettability, adhesion, and surface void characteristics to provide an efficient interfacial heat transfer between the YAG crystal and the thermal management device.
3. The method of claim 2 , wherein the metallizing comprises applying a Au—Ni—Cr layers on the ion implanted surface layer.
4. The method of claim 3 , wherein a thickness of the Au layer is selected to be between about 0.5 and 0.7 microns to avoid embrittling a joining layer between the ion implanted surface layer and the thermal management device.
5. The method of claim 3 , wherein a thickness of the Ni and Au layers is selected to be between about 0.7 and 1 microns so as to provide a desired wettability of the ion implanted surface layer.
6. The method of claim 1 , wherein the thermal management device comprises at least one of a heat exchanger, a heat spreader, and/or an active or passive heat sink devices.
7. The method of claim 1 , wherein the joining comprises soldering or brazing.
8. The method of claim 1 , wherein the surface layer of the YAG crystal is an amorphous polished surface layer.