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... Laboratories Inc., this organization is an independent, not-for-profit product- safety testing and certification organization. In the beginnings of UL more than 100 years ago | PRINTED CIRCUIT BOARDS SUPPLIERS | stood questions in the range of fire-protection-mechanisms in the foreground. Today all possible products, materials, constructions and systems are tested and evaluated regarding their electrical | PRINTED CIRCUIT BOARDS SUPPLIERS | danger as well as their danger of accident and fire. And in addition there were examined alarm systems and the ability to discover, control and | PRINTED CIRCUIT BOARDS SUPPLIERS | prevent fire. UL develops safety regulations, which are taken over frequently as ANSI standards. Underwriters Laboratories certify and register customers according to ISO 9000. What | PRINTED CIRCUIT BOARDS SUPPLIERS | means this indication for the Microcirtec GmbH and their customers? Products with this indication have international a higher acceptance. Many customers wish or demand a | PRINTED CIRCUIT BOARDS SUPPLIERS | UL marking. The marking offers easements in questions of the product liability and brings a higher acknowledgment at authorities. ...
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... two-step process can be extended, of course, to include more than two layers. In this case, laser fluence would be automatically modulated higher for | PRINTED CIRCUIT BOARDS SUPPLIERS | each copper layer encountered and lower for each dielectric layer. A CO2 laser can be used along with the UV DPSS in a dual-laser setup | PRINTED CIRCUIT BOARDS SUPPLIERS | that combines the ablation speed of CO2 on dielectric materials with the ability of UV DPSS to ablate copper. This procedure obviates the need for | PRINTED CIRCUIT BOARDS SUPPLIERS | precise fluence control of a single UV DPSS laser and capitalizes on the selective ablation thresholds of different materials at different wavelengths. The dual-laser approach | PRINTED CIRCUIT BOARDS SUPPLIERS | therefore boosts panel throughput by exploiting the advantages of both lasers and circumventing their limitations. Moreover, the dual-laser technique, like the other laser processes, requires | PRINTED CIRCUIT BOARDS SUPPLIERS | only a single panel run to complete all steps of microvia formation. The dual-laser technique illustrates the versatility of CO2 and UV DPSS lasers for | PRINTED CIRCUIT BOARDS SUPPLIERS | high-volume microvia formation over a broad ...
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... contain the following information to ensure that the finished board is to your requirements. - Always required even when a drill file is supplied, | PRINTED CIRCUIT BOARDS SUPPLIERS | to enable inspection of panels immediately after drilling and finished boards prior to despatching. Hole sizes must be clearly represented with distinct differences between each | PRINTED CIRCUIT BOARDS SUPPLIERS | size. Tolerances are not required unless different to our standard of +0.1 / -0.05 mm. - Preferred with overall mechanical dimensions including notches, cutouts and | PRINTED CIRCUIT BOARDS SUPPLIERS | slots. Also preferred is a positioning (datum) dimension (drilled hole is best). Tolerances are not required unless different to our standard of + / -0.25 | PRINTED CIRCUIT BOARDS SUPPLIERS | mm. Other information required for all boards includes: board thickness (standard = 1.6mm) base copper thickness (std = 18mm) solder mask colour (std = green) | PRINTED CIRCUIT BOARDS SUPPLIERS | solder mask type (std = liquid photoimageable) component legend colour (std = white) bare board testing requirement (std for multilayer and fine line production runs) | PRINTED CIRCUIT BOARDS SUPPLIERS | Extra information ...
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