zig zag at elvia - indico.bnl.gov · elvia, french pcb company •french leader in p, with several...
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Zig Zag at ElviaS. Aune
MPGD-4-LDRD
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Elvia, French PCB company
• French leader in PCB, with several plants in France (CA ~75 M€)• For standard PCB and bulk: Coutance.
• Collaboration since 15 years on PCB for micromegas
• In 2012 technologic transfer for the Bulk process• Elvia realized bulk detector for the scan pyramid project.
• For the Saclay Bulk Lab, close collaboration with Elvia for:• Screen printing• Insulation mask an material• PCB and Kapton manufacturing• Bulk process
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Laser test at Elvia / Coutance in October 2017Pico Flex, a laser machine for cutting and drilling PCB and KaptonCO2 laser of 20 µm (different focusing under consideration)Test on PCB with 9 µm copper
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Laser test at Elvia / Coutance in October 2017Maximum PCB seize: 630 x 620 mm, active area: 600 x 590 mmGerber file to be re work for native machine soft: give the laser traject with 20 µm wide “laser pencil”Two parameter for etching the copper (and not the pcb): laser power (8 W) and number of pass (12)Time for 5x5 cm² of zig zag = ~ 1 min (if 5 µm copper divide by two)
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Laser video
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Laser test at Elvia / Coutance in October 2017
Gerber from Alexander
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Laser test at Elvia / Coutance in October 2017
After laser etching, and chemical etching (0.5 µm removal) to remove small “items”
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Cut view
9 µm
20 µm
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Strait strips = easy
20 µm inter
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Zig zag test 2
Issue with the end of the triangle !Must be rounded ?
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Zig Zag pattern = OK
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Diamond pattern
OK, but end of diamond to be rounded ?
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Diamond: bad try
The 20 µm laser overlap not good !
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Next test• A RD3 zig zag to be made in January 2018
• Remove the copper by chemical etching all around active area
• Laser the active area, with chemical etching finish
• Ni-Gold finishing (tbc)