Multilayer Circuit Boards Industry The costs of PCB or Printed Circuit Boards are also slightly lower than Immersion Nickel Gold.

... BOARDS | Multilayer Manufactoring - An Overview Simply defined, a Multi-Layer Board (MLB) is an interconnected package which contains more than two layers of | MULTILAYER CIRCUIT BOARDS INDUSTRY | circuitry. Multilayer technology evolved as circuit requirements grew and the space in which to fit them shrank. Surfacemounted technology (SMT), which not only reduced the | MULTILAYER CIRCUIT BOARDS INDUSTRY | size of components but also allowed components to be attached to both sides of the PCB, further accentuated the need for MLBs of increasing complexity. | MULTILAYER CIRCUIT BOARDS INDUSTRY | Alternative via-hole technologies for MLBs are also presented at the end of this document. The Cycle Multilayer manufacture can be broken into three parts; inner | MULTILAYER CIRCUIT BOARDS INDUSTRY | layer fabrication, lamination and manufacture as it applies to double-sided boards. The first two steps, specific to multilayers are shown in the following flow chart: | MULTILAYER CIRCUIT BOARDS INDUSTRY | Just click on the start button and you can see awful fotos of how a state-of-the-art facility works. (Sorry - no frequent flyer miles apply)!' | MULTILAYER CIRCUIT BOARDS INDUSTRY | Customer Contact | OUR SALES ...
[ Multilayer Circuit Boards Industry ]


... Now, a typical HDI panel contains about 250,000 microvias.4 The combination of high demand, abbreviated product cycles, shrinking IC packaging, and soaring interconnect densities | MULTILAYER CIRCUIT BOARDS INDUSTRY | places a high value on the development of cost-effective, high-volume microvia formation processes. | HIGH-VOLUME MICROVIA FORMATION METHODS | There are four techniques most commonly | MULTILAYER CIRCUIT BOARDS INDUSTRY | used to generate microvias: mechanical drilling, laser drilling, plasma, and photo (liquid or film) formation. This article will concentrate on the first two techniques. The | MULTILAYER CIRCUIT BOARDS INDUSTRY | choice of which drilling technology to use depends upon material properties and desired hole diameter. Figure 3 is a synopsis of hole manufacturing technology capabilities. | MULTILAYER CIRCUIT BOARDS INDUSTRY | Figure 3. | HOLE MANUFACTURING | technology capabilities, based on material, hole diameter and type, and process type. The most established | MICROVIA TECHNOLOGY |, | MULTILAYER CIRCUIT BOARDS INDUSTRY | mechanical drilling, has existed since the first generation of single-sided PCBs, and it has proved surprisingly adaptable ...
[ Multilayer Circuit Boards Industry ]


... gold plating the selected area, 2) nickel plating and then gold flash over the entire contact, and finally a selective heavy gold plating in | MULTILAYER CIRCUIT BOARDS INDUSTRY | the desired contact area. | SEMI-ADDITIVE-PROCESS | An additive process for obtaining conductive patterns which combines an electroless metal deposition on an unclad substrate with | MULTILAYER CIRCUIT BOARDS INDUSTRY | electroplating or with etching, or with both | SMOBC SOLDER MASK OVER BARE COPPER. | A method of fabricating a printed wiring board which results | MULTILAYER CIRCUIT BOARDS INDUSTRY | in the final metallization being copper with no other protective metal but the non soldered areas are coated by a solder resist, exposing only the | MULTILAYER CIRCUIT BOARDS INDUSTRY | component terminal areas. | SOLDER LEVELING |The process of dipping PCB's into hot liquids, or exposing them to liquid waves to achieve fusion. First, flux | MULTILAYER CIRCUIT BOARDS INDUSTRY | is applied to the board by dipping or brushing. Then the board is preheated in a liquid (maintained at 250 F). Next, the board is | MULTILAYER CIRCUIT BOARDS INDUSTRY | immersed in fusing liquid at 430 - 500 F. Finally, it is dipped in another 250 F liquid to ...
[ Multilayer Circuit Boards Industry ]