USB-KW019032 Freescale USB Dongle Development Board , User’s Guide, Rev. 0, 10/2015
26
Freescale Semiconductor, Inc.
Revision history
5.5
Silk screen
The silk screen must meet the following requirements:
•
Silk screen color must be white
•
Silk screen must be applied after the application of solder mask (if solder mask is required)
•
The silk screen ink must not extend into the plated-thru holes
•
The silk screen must be clipped back to the line of resistance
5.6
Electrical PCB testing
•
All PCBs must be 100% tested for opens and shorts
•
Impedance measurement report is not mandatory
5.7
Packaging
The packaging of the PCBs must meet the following requirements:
•
Finished PCBs must remain in panel
•
Finished PCBs must be packed in plastic bags that do not contain silicones or sulphur materials,
as these materials can degrade solderability
5.8
Hole specification / tool table
See the
ncdrill-1-4.tap
file included with the Gerber files and the
FAB-28746.pdf
file.
5.9
File description
The files included with the download are Design, Gerber, and PDF files. Gerber files are in RS-274x
format. Not all files included with the Gerber files are for PCB manufacturing purposes.
The included PDF files are:
•
FAB-28746.pdf –
Board fabrication drawing
•
GRB-28746.zip
– Freescale Freedom
®
board metal layers, solder mask, solder paste, and silk
screen
•
SPF-28746.pdf
– Freedom board schematic
Design files are in Cadence
®
Allegro
®
format with OrCAD
®
schematic capture.
6
Revision history
Revision
number
Date
Substantive change(s)
0
10/2015
Initial release
