Thin film coating
LEW Techniques offers a subcontract service for the vacuum coating of components with thin films. For demanding applications thin films of metals can be sputtered or evaporated onto metals, ceramics, or other difficult-to-coat surfaces. These coatings can provide conductive and solderable layers on non-conductive materials or barriers and protective finishes on difficult-to-plate metals. Our manufacturing know-how and dedicated in-house facilities allows us to offer a comprehensive and versatile service.
Housed in a class 10,000 clean room, our thin film facilities include:
Component geometry limits
Depending on the equipment and coating types required up to four different coatings can be sequentially deposited in each coating run.
|Adhesion||Ti, Cr, NiCr, TiW, TaN|
|Barrier||Pd, Pt, Ni|
|Typical coating schemes include:|
|Cr/Au||For decorative/reflective finish|
|TiW/Pd/Au||For SnPb, SnAg soldering|
|TiW/Pd/Au/Ni/Au||For additional soldering leach resistance|
|Ti/Pt/Au||Best soldering performance but more costly|
|NiCr||For protective finish|
|Ti/Cu/Ni/Au||For high conductivity|
|AuSn||Solder pre-deposition for critical attach|
|Typical deposition thickness:|
|Adhesion layers||100 – 2000 Å (angstroms)|
|Barrier layers||0.1 – 2 μm|
|Conductors||0.2 – 5 μm|
By using physical masks the coatings can be selectively deposited onto required areas only.
High resolution patterning
Utilising wet or dry film photo resists, fine high density lines and features can be resolved to create circuits, logos and other images.
Contact us for details of our comprehensive capabilities for manufacturing RF and optoelectronic microcircuits.