Grade
Thermal conductivity
CTE |
90/10 (W/Cu)
185 W/mK
6.4 ppm/°C |
 |
| Mechanical Dimensions |
|
Min. length and width
Max. length and width
Thickness range |
1.0 mm x 1.0 mm
15 x 5 mm
0.25 - 1.5 mm |
|
| Tolerances |
|
Length and width
Thickness
Edge chipping
Flatness
Surface finish
Critical edge radii |
Typ.
± 0.05 mm
± 0.05 mm
< 0.05 mm
1µm/mm
< 1.0µm Ra
< 30µm |
High spec.
± 0.02 mm
± 0.01 mm
< 0.02 mm
0.5 µm/mm
< 0.25µm Ra
< 5µm |
|
| SHARP EDGE |
|
| The laser bar will usually need to be closely aligned with one edge of the submount. Standard edges are as machined. For critical applications one edge can be made super sharp. |
|
Critical edge radii
Other edges |
Standard
< 30 µm
< 50 µm |
Super sharp
< 5 µm
< 50 µm |
|
| METALLISATIONS |
|
|
| Various metallisation schemes can be applied. The standard coating is vacuum sputtered Ti/Ni/Pt/Au. |
|
Faces
Side walls |
0.1µm Ti / 2.0µm Ni / 0.2µm Pt / 0.5µm Au
~1/3 thickness of faces.
|
|
| PRE-DEPOSITED AuSn |
|
|
| A thin layer of vacuum deposited AuSn can be applied over one or both of the top and bottom faces. The standard alloy ratio is nominally 76 Au/24 Sn, normally at ~3.5 - 5.5 microns thick. The alloy ratio can be tailored for specific applications. The solder layer can also be wrapped over the critical edge to aid solder wetting and minimise solder balling in front of the laser facet. |
|
| PATTERNED ALN AND OTHER METAL LASER MOUNTS |
|
| This website also contains details of our capabilities for manufacturing patterned AlN laser mounts together with sharp edge C-mounts, photodiode mounts and other optoelectronic and RF related products. |
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