IOBridge.wirewrap.tioga
Copyright Ó 1988 by Xerox Corporation. All rights reserved.
Christophe Cuenod August 23, 1988 5:53:03 pm PDT
IOBridge.wirewrap
- Board size :13.5" by 12.537"
- Total number of holes 5760.
- 6 layers multilayer board (4 signal layers and 2 power planes).
- Signal layers are in 1/2 once copper.
- Power planes are in 1 once copper.
- FR4 laminate
- Board thickness is 100 mils + 0 - 5 mils.
- Minimum geometry:
6 mils traces.
6 mils spaces.
Smallest hole diameter 21 mils drilled.
Minimum annular ring in trace layers 5 mils over drilling size (31 mils pads for 21 mils drilled).
Minimum annular ring in power layers 11 mils over drilling size (43 mils pads for 21 mils drilled).
Maximum holes aspect ratio 4.75 (100/21).
Most of the holes have a very tight tolerence: +/- 0.5 mils (press fit pins are going to be inserted in them)
- Solder mask over bare copper on top and on bottom.
- Silkscreen on top.
- 424 golden card edge fingers (200u Ni, 75u Au)
Beware the two raws.
If easier the board can be completely gold plated on both sides.
- Drill Tape info
The origin is one inch above and 1 inch to the left of the upper left corner of the board.
The x dimension increases to the right
The y dimension increases down the board.
1 16 Yes 424 +/- 5 mils via holes
2 40 Yes 1584 +/- 5 mils Patch area
3 55 Yes 1344 +/- 0.5 mils R, C, and most U
4 67 Yes 2400 +/- 0.5 mils 8 times 300 pins PGA
5 93 Yes 6 + /- 5 mils J3, J10, J11
7 144 No 2 + /- 3 mils E1 (mounting)
- Board Routing.
The dimensions around the connectors are mesured with respect to the copper tolling marks.