... of humidity the weight of the epoxyraisin of the Multilayer PCB`s rises 0,12 % due to the accumulation of moisture. If the capillary effect | MULTILAYER CIRCUIT BOARDS FABRICATORS | leads to an increase of more than 0,17 % a gas pressure of 8-10 bar can be reached, causing delamination Even if delamination tests are | MULTILAYER CIRCUIT BOARDS FABRICATORS | made after production, the danger of delamination can rise again due to unsafe transportation and long storage times. Therefore we would like to give you | MULTILAYER CIRCUIT BOARDS FABRICATORS | following proposals to avoid the described problems: B STORAGE CONDITIONS PCB`s should be stored in heated and dry rooms. Constant low humidity is necessary before | MULTILAYER CIRCUIT BOARDS FABRICATORS | the soldering processes start. A rapid fall in temperature of more than 7 degrees causes condensation on the stored PCB`s. Humidity should never exceed 65 | MULTILAYER CIRCUIT BOARDS FABRICATORS | %. The package must be kept intact although the polyethylene packages capability of keeping humidity away is not really reliable. C STORAGE TIME The storage | MULTILAYER CIRCUIT BOARDS FABRICATORS | time of PCB`s should be as short as possible. PCB`s should be taken out due to the ...
[ Multilayer Circuit Boards Fabricators ]


... several panels simultaneously to achieve higher throughput and lower processing costs. Mechanical drilling is an effective method for hole diameters larger than 0.010" (250 | MULTILAYER CIRCUIT BOARDS FABRICATORS | microns). Below 0.010", however, operational costs rise exponentially. For example, a manufacturer might get 5,000 hits per drill bit when forming 0.008" or 0.010" vias | MULTILAYER CIRCUIT BOARDS FABRICATORS | but only 1,000 hits per bit for 0.006" vias. However, recent advances in mechanical drilling technology such as high-speed spindles (Figure 4a and 4b) have | MULTILAYER CIRCUIT BOARDS FABRICATORS | increased drill bit life two to three times over previous generations of mechanical drills. And since the PCBs can be stacked, it is possible for | MULTILAYER CIRCUIT BOARDS FABRICATORS | mechanical drills to be similar to laser | DRILLS IN PR| DRILLS IN PR| DRILLS IN PR| manufactured by mechanical drills currently seems to be | MULTILAYER CIRCUIT BOARDS FABRICATORS | 0.006". To drill holes smaller than 0.006" would require alternate hole formation technology. There are current R&D efforts to drill holes of 0.002" to 0.003" | MULTILAYER CIRCUIT BOARDS FABRICATORS | in diameter. Diameter, however, is not the only ...
[ Multilayer Circuit Boards Fabricators ]


... Dear Sir or Madam, welcome to our client-service-forum for printed circuit boards! Here we have chosen specific topics you have ask for to help | MULTILAYER CIRCUIT BOARDS FABRICATORS | you finding a suitable answer. Please click a topic below to view frequently asked questions in that topic. | WHICH DATA FORMATS DO YOU PREFER? | MULTILAYER CIRCUIT BOARDS FABRICATORS | | DIN EN ISO 9001:2000 > Are you certified? Hot shot > Do you offer such a service? Methods of Shipment > Which modes of | MULTILAYER CIRCUIT BOARDS FABRICATORS | shipment do you offer? Standard lead times > Surcharge? UL-Approval > What and for which is that? Delivery in Panelized Boards (PB) > What is | MULTILAYER CIRCUIT BOARDS FABRICATORS | to be considered? Design Rule Check (DRC) > What is that? MAA's Basic Jet Line> What are MAA's and how can i calculate this? Multi-Panel | MULTILAYER CIRCUIT BOARDS FABRICATORS | (MP) > What is that and which one must consider? Surface (2) > RoHS-Compliance (leadfree)? Test Points > How can i calculate the test points? | MULTILAYER CIRCUIT BOARDS FABRICATORS | Working Days > What is your definition of a working day? You may also be interested in... Password > Which syntax is permitted? Value Added | MULTILAYER CIRCUIT BOARDS FABRICATORS | Tax (VAT) > ...
[ Multilayer Circuit Boards Fabricators ]