Multilayer Boards Suppliers A process for obtaining conductive patterns by the selective deposition of conductive material on Printed Circuit Board (PCB)

... and the use of alternative surface refinements for pcb´s has so far provided unsatisfactory results, meaning that the lead-free problem has yet to be | MULTILAYER BOARDS SUPPLIERS | resolved. The chemical nickel-gold procedure (Imm NiAu) was unsuccessful due to high costs, as was chemical tin. Both procedures have proven to be very complicated | MULTILAYER BOARDS SUPPLIERS | and sensitive in the further course of processing management. Lead-free solderings also have serious disadvantages, as hot air tin surfacing exposes the multi-layers to higher | MULTILAYER BOARDS SUPPLIERS | processing temperatures and copper leaching effects. would briefly like to explain why chemical silver is the lead-free procedure of the future, and why it will | MULTILAYER BOARDS SUPPLIERS | be the focus of our future investments in the field of surface refinement: UNPROBLEMATIC WASTE WATER PROCESSING Similarly to chemical tin surfacing, it is a | MULTILAYER BOARDS SUPPLIERS | non-electrical, auto-catalytic procedure based on the contrasting electro-negativity of copper and the more “precious” silver. The advantages of this processing manner compared with ...
[ Multilayer Boards Suppliers ]


... application of LPI solder mask. A special hand screening area is available for such applications. This hand screening does add additional cost to the | MULTILAYER BOARDS SUPPLIERS | product. Curtain Coat LPI Mask (alternativ) Solder mask is also be applied using a curtain, single sided coating system. The equipment is designed specifically for | MULTILAYER BOARDS SUPPLIERS | the application of liquid photoimagable (LPI) solder mask. Dry LPI Mask Liquid photoimagable solder mask is an epoxy polymer material which is cross-linked or cured | MULTILAYER BOARDS SUPPLIERS | by the application of heat. Since the solder mask cannot be imaged in a liquid state, the screened solder mask must be dried without actually | MULTILAYER BOARDS SUPPLIERS | curing the material. Drying is done in an oven designed specially for this application. A single heater plenum and a unique baffle system effectively removes | MULTILAYER BOARDS SUPPLIERS | the solvent from the liquid solder mask without starting the cross-linking action. Screened panels are manually loaded into the conveyorized oven as they come off | MULTILAYER BOARDS SUPPLIERS | the screen printer. The dried panels are ...
[ Multilayer Boards Suppliers ]


... of 2001 the market should reach $5.6 billion - up another 50 percent over 2000. These same data show Japan as the microvia leader, | MULTILAYER BOARDS SUPPLIERS | followed by Europe, Asia, and North America. Several factors contribute to this remarkable expansion, the most important being the steadily increasing interconnect density of PCBs. | MULTILAYER BOARDS SUPPLIERS | Microvias have become an attractive interconnect alternative when the wiring density on a PCB approaches 160 I/Os per sq. in.2 Viewed another way, a typical | MULTILAYER BOARDS SUPPLIERS | PCB in 1997 averaged about 485 I/Os per sq. in., whereas this year the lead density should average close to 1,800 leads/sq. in. for multilayer | MULTILAYER BOARDS SUPPLIERS | PCBs.3,4 Space-efficient routing between layers is necessary due to increased densities and reduced dependence on through-hole technology. Area-array packages such as BGAs, CSPs, and flip | MULTILAYER BOARDS SUPPLIERS | chips shift the burden of interconnect fan-out to the PCB, increasing the need for higher wiring capacity. As the form factor for such devices continues | MULTILAYER BOARDS SUPPLIERS | to shrink and I/O density mushrooms, the ...
[ Multilayer Boards Suppliers ]