K5cable1
	 New layout of short tails to (almost) NIKHEF design rules 

This design is to the original length of the prototypes  

N.B. ***** Length may change and two versions are probably needed with 12 off made longer than all others to fit with widely spaced stations  


Layout is metric - gerbers should be loaded using 3 whole digits and 4 fractional

Drill file is excelon format and METRIC 

Drawn with 
- nominally 6mil track and gap but traces plotted as 5.91mil and minimum space the same 

Holes are 20 mil but lands are drawn as 36mil (NIKHEF USE 40MIL)
                   


no pear drops where traces meet holes - but all trace to pad junctions are under stiffener

Clearance of pad to trace and pad to filled areas is > 8 mil  

Layout is drawn with connectors on the underside as viewed 




layers are - from top:

c15stif.lgx stiffener

c15mskt.lgx top side solder mask -just clears connector positioning holes - could omit

c15m1.lgx metal 1 is just via pads - could omit if the cable is made as a 3 layer not 4

c15m2.lgx power plane - no holes for outgassing!!! - do we need them?

c15m3.lgx signal traces

c15m4.lgx ground plane and surface mount pads for connectors. no holes for outgassing!

c15mskb.lgx bottom (connector) side solder mask.

c15outl.lgx outline of circuit  

c15drll.lgx - gerber of drill positions not sure of any size info - use excellon file

K5cable1.drl  excellon drill file