Thin-film Guidelines/ Page 23 of 23
Nanowave Confidential
The film masks are used in the following cases:
· all substrate patterns on duroid material
· engineering prototypes and production substrates on ceramic without critical
dimensions
5.3
Mask
Ordering
The mask ordering process is initiated by the engineer or expediter responsible for the
substrate desired. Once the substrate design is on the CAD and into its final form with the
etch factor included, the order form for a glass/film mask can be written by engineering and
processed by CAD services. DXF file is the preferred format for mask generation.
6.0 INSPECTION
CRITERIA
Etched substrates submitted to incoming inspections are visually checked for defects per
QS6090001, section III.
7.0 PARTS
HANDING
Etched ceramic substrates are handled like any other gold metalized chip. Tweezers are used
for pick-up and transfer, not bare fingers. To prevent surface scratches, the substrates are
separately bagged or put in waffle packs. The substrates have an infinite storage life.
Etched duroid substrates should also be handled with tweezers. They do not have to be bagged
separately, but waffle packs or bags are still recommended. The unplated duroid does have a
shelf life, since the copper will oxidize with time. The sooner the duroid can be use, the easier it
will be to assemble.
Summary :
Thin-film Guidelines/ Page 23 of 23 Nanowave Confidential The film masks are used in the following cases: · all substrate patterns on duroid material · engineering prototypes and production substrates on ceramic without critical dimensions 5.3 Mask Ordering The mask ordering process is initiated by the engineer or expediter responsible for the substrate desired.
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substrates,mask,duroid,etched,hae,substrate,handled,ceramic,waffle,ordering,packs,cad,tweezers