... specially designed horizontal processing equipment or in the vertical mode using a standard immersion type plating line. When choosing a processing method, the following | MULTILAYER CIRCUIT BOARDS SHOP | guidelines should be taken into consideration. Horizontal processing is recommended under the circumstances noted below. 1. Aspect ratios greater than 5:1 2. Plated through-hole diameters | MULTILAYER CIRCUIT BOARDS SHOP | smaller than 0.016 in (0.4 mm) 3. Blind vias 4. Thin, flexible materials If high aspect ratio and small holes are processed in the vertical | MULTILAYER CIRCUIT BOARDS SHOP | mode, vibration is recommended for each processing stage. The DMS-E process includes no cleaning sequence, therefore copper surfaces should be clean and holes should be | MULTILAYER CIRCUIT BOARDS SHOP | free of all drill debris. This may be achieved by chemical cleaning (e.g. ultrasonics) or by brushing with an ultrasonic section to remove the drill | MULTILAYER CIRCUIT BOARDS SHOP | debris prior to the DMS-E process. When processing double-sided panels through a horizontal line using sulfuric acid (e.g. Stabilizer) it is important to ensure that | MULTILAYER CIRCUIT BOARDS SHOP | the ...
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... time after drying should not exceed 48 hours not to rise the risk of delamination again. | FORMING MICROVIAS |. (Demand for small holes | MULTILAYER CIRCUIT BOARDS SHOP | is ramping, with CO2 lasers leading the way) Thanks largely to the proliferation of smaller, more complex electronics devices such as cell phones, personal digital | MULTILAYER CIRCUIT BOARDS SHOP | assistants, and notebook computers, the PCB industry is experiencing an overwhelming rise in demand for high-density interconnect structures (HDIS). The demand for HDIS translates directly | MULTILAYER CIRCUIT BOARDS SHOP | into a vigorous market for the microvias used in many of these multilayer substrates as well as in conventional PCBs. In 1998, for example, the | MULTILAYER CIRCUIT BOARDS SHOP | worldwide microvia market made up about four percent of the total multilayer PCB market. By 2007 that market share is expected to expand to nearly | MULTILAYER CIRCUIT BOARDS SHOP | 30 percent (Figure 1). Figure 1. Estimates predict | MICROVIA BOARDS | will comprise 29 percent of all buildup boards by 2007. Worldwide, the | | MULTILAYER CIRCUIT BOARDS SHOP | TOTAL MICROVIA | market approached $4 billion in 2000 - up 63 percent ...
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... quality-personel for examination. This logs and commentates on the basis of inspection schemes the quality status and the product agreement with the technical regulations | MULTILAYER CIRCUIT BOARDS SHOP | of the client, so that a permanent feedback for all involved persons is given. Apart from the technical pre-production the quality assurance maintains the updating | MULTILAYER CIRCUIT BOARDS SHOP | utility by means of internal indexings of the documents. - | THIS SEQUENTIALLY DOCUMENTED PRODUCTION | order serves on the one hand the evaluation of | MULTILAYER CIRCUIT BOARDS SHOP | individual requirements of the product and on the other hand as result of the production achievement of the collection of actual quality criteria in the | MULTILAYER CIRCUIT BOARDS SHOP | sense of the SPC (statistical process control). The interprocessual examinations are made in accordance with inspection schemes. As a final output examination our quality assurance | MULTILAYER CIRCUIT BOARDS SHOP | provides central an output report on the basis of the systematically collected data, that documents the fulfilment of the assured characteristics. - | WITH THE | MULTILAYER CIRCUIT BOARDS SHOP | ELECTRICAL ...
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