... spacing Identify potential drill problems. Validate soldermask layers. First off, make sure layers are properly | ALIGNED | and ordered correctly. File names should | PRINTED CIRCUIT BOARDS FABRICATORS | be meaningful, correlated with the layers, and explained to the fabricator in a README file. The idea here is that the fabricator should be able | PRINTED CIRCUIT BOARDS FABRICATORS | to quickly understand what each file is and where it goes in the stackup. If you wish to continue using | GERBER DATA |, switch | PRINTED CIRCUIT BOARDS FABRICATORS | to 274X. 274D is obsolete; the external aperture information is more cumbersome and difficult for fabricators to deal with because they have to worry about | PRINTED CIRCUIT BOARDS FABRICATORS | translators and parsers to read the aperture table information. As a result, aperture data might be misinterpreted. Worse, someone might have typed in the information | PRINTED CIRCUIT BOARDS FABRICATORS | manually - and erroneously. By contrast, in 274X, all the aperture information is contained within the Gerber file, which can be read by most CAM | PRINTED CIRCUIT BOARDS FABRICATORS | tools automatically. For netlists, | IPC-D-356 | is the preferred format for ...
[ Printed Circuit Boards Fabricators ]


... be kept below this size. | THE MILLING GROOVE | for the outer contour is 2.4 mm. The boards are milled in accor-dance with | PRINTED CIRCUIT BOARDS FABRICATORS | the dimensionlayer, which must be a separate layer containing just the unbroken contour of the boards (edge markings or drawings are not suitable and result | PRINTED CIRCUIT BOARDS FABRICATORS | in additional charge). | SELECTED CAPABILITIES: | Archiving Process Data Drill- / Milling Program Archiving Customer Data Production Data Conversion E-Test optional Design Check UL | PRINTED CIRCUIT BOARDS FABRICATORS | - approval Design Adjustment Further Options | TECHNICAL SPECIFICATION: | "Delivery: Multi-Panel (MP): Delivery-Size of the Panelized Board Array is 490 mm x 290 mm | PRINTED CIRCUIT BOARDS FABRICATORS | with Fixing Tabs by Min-Distance between the Boards of 2,4 mm. | MILLING-COORDINATES [-?-]: | One MAA-Unit (MAA-U) is made up of 20 MAA´s | | PRINTED CIRCUIT BOARDS FABRICATORS | DATA-BASE FORMAT: | Gerber, ODB++, DPF Type of the Base Material: FR 4 Layers: 1, 2, 4 | SURFACE PROTECTION: | HAL Layer Build-Up: | | PRINTED CIRCUIT BOARDS FABRICATORS | ELECTRICAL TESTING: | No Final Thickness of PCB: 1,00 mm to 2,40 mm Junction in ...
[ Printed Circuit Boards Fabricators ]


... the lead-free problem has yet to be resolved. The chemical nickel-gold procedure (Imm NiAu) was unsuccessful due to high costs, as was chemical tin. | PRINTED CIRCUIT BOARDS FABRICATORS | Both procedures have proven to be very complicated and sensitive in the further course of processing management. Lead-free solderings also have serious disadvantages, as hot | PRINTED CIRCUIT BOARDS FABRICATORS | air tin surfacing exposes the multi-layers to higher processing temperatures and copper leaching effects. We would briefly like to explain why we believe chemical silver | PRINTED CIRCUIT BOARDS FABRICATORS | is the lead-free procedure of the future, and why it will be the focus of our future investments in the field of surface refinement: UNPROBLEMATIC | PRINTED CIRCUIT BOARDS FABRICATORS | WASTE WATER PROCESSING Similarly to chemical tin surfacing, it is a non-electrical, auto-catalytic procedure based on the contrasting electro-negativity of copper and the more “precious” | PRINTED CIRCUIT BOARDS FABRICATORS | silver. The advantages of this processing manner compared with chemical tin are fewer processing steps and lower rinsing temperatures (30 – 50 C°). From the | PRINTED CIRCUIT BOARDS FABRICATORS | printed ...
[ Printed Circuit Boards Fabricators ]