... just right. You hand the data set to the fabricator, and voila! No unexpected phone calls, no changes in the layout, and the fabricator | CIRCUIT BOARDS SERVICES | happily sends back a good set of boards on time. Our recommendations for the correct storage of PCBs and MLBs A.1 ) Brief desricption of | CIRCUIT BOARDS SERVICES | the problem: PCB`s, especially Multilayer boards are extremly sensitive towards moisture The microscopic structure of the Multilayer material develops a strong capillary power that soaks | CIRCUIT BOARDS SERVICES | up the humidity of the surrounding air. Even under very dry conditions it is a question of time that water accumulates in the stored PCB`s. | CIRCUIT BOARDS SERVICES | For example: At storage conditions of 20 C° and 35 % of humidity the weight of the epoxyraisin of the Multilayer PCB`s rises 0,12 % | CIRCUIT BOARDS SERVICES | due to the accumulation of moisture. If the capillary effect leads to an increase of more than 0,17 % a gas pressure of 8-10 bar | CIRCUIT BOARDS SERVICES | can be reached, causing delamination Even if delamination tests are made after production, the danger of delamination can rise again ...
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... PCBs / E-Test / Methods of Shipment and Lead Times b.) Order based on new data files. This will lead you to the screen | CIRCUIT BOARDS SERVICES | where to upload the new data files. You are able to modify the following specs to your actual demand: Number of Units of each PCBs | CIRCUIT BOARDS SERVICES | / E-Test / Methods of Shipment / Lead Times. Please note that you can send new data files, but you can not modify technical features | CIRCUIT BOARDS SERVICES | like: changing “2-Layers to 4-layers” or “no silk screen to silkscreen”. If you want to modify those technical features, you have to start from the | CIRCUIT BOARDS SERVICES | beginning, which means, make up a new calculation, put the board into the shopping basket, order and send the new data files. | STANDARD LEAD | CIRCUIT BOARDS SERVICES | TIMES | > Do I have to expect surcharges? A The selected Standard Lead Time is extended by those additional working days, which are highlighted | CIRCUIT BOARDS SERVICES | in the following quotation in the lines “surcharge on standard lead times", "silk screen" and "material / V-cutting". B In order to keep our delivery-on-time-commitment | CIRCUIT BOARDS SERVICES | a ...
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... 47805 KREFELD FED REP GERMANY Clad Cond Width Min Min Edge Thk SS DS + Max Area Diam Sold Lts Max Oper Temp UL94 | CIRCUIT BOARDS SERVICES | Flame Meets UL796 Type my IN. my In. my Mil. mm In. C Sec C Class DSR Single layer printed wiring board. Soco 330 0.013 | CIRCUIT BOARDS SERVICES | 500 0.020 8 0.32 DS 28.5 1.125 260 5 120 V-0 --- Soco1 150 0.006 250 0.010 17 0.65 DS 50.8 2000 288 20 130 | CIRCUIT BOARDS SERVICES | V-0 All Multi layer printed wiring board. ML1+ 150 0.006 250 0.010 17 0.65 DS 50.8 2000 288 20 130 V-0 All + SS-Single sided, | CIRCUIT BOARDS SERVICES | DS-Double or single sided Marking Company name, "MIC" or trademark and type designation may be followed by suffix to denote factory indentification or buring test | CIRCUIT BOARDS SERVICES | classification. See General Information Preceeding These Recognitions A (black triangle ) Symbol is marked on those products within a given type designation that comply with | CIRCUIT BOARDS SERVICES | direct support of current-carrying parts performance level require-ments of UL 796. "All" is used to indicate that all base materials under that type designation comply | CIRCUIT BOARDS SERVICES | with direct support ...
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