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Surface-mount technology was developed in the 1960s. By 1986, surface-mounted components accounted for 10% of the market at most but were rapidly gaining popularity. [4] By the late 1990s, the great majority of high-tech electronic printed circuit assemblies were dominated by surface mount devices.
Although surface-mount, these devices require specific process for assembly. Chip-on-board (COB) , a bare silicon chip, that is usually an integrated circuit, is supplied without a package (which is usually a lead frame overmolded with epoxy ) and is attached, often with epoxy, directly to a circuit board.
Surface mount components are placed along the front (and often back) faces of the machine. Most components are supplied on paper or plastic tape, in tape reels that are loaded onto feeders mounted to the machine. Larger integrated circuits (ICs) are sometimes supplied and arranged in trays which are stacked in a compartment. More commonly used ...
A stud grid array (SGA) is a short-pinned pin grid array chip scale package for use in surface-mount technology. The polymer stud grid array or plastic stud grid array was developed jointly by the Interuniversity Microelectronics Centre (IMEC) and Laboratory for Production Technology, Siemens AG. [4] [5]
Cross-cut section of BGA mounted circuit. A ball grid array (BGA) is a type of surface-mount packaging (a chip carrier) used for integrated circuits. BGA packages are used to permanently mount devices such as microprocessors. A BGA can provide more interconnection pins than can be put on a dual in-line or flat package. The whole bottom surface ...
Surface mount packaging appeared in the early 1980s and became popular in the late 1980s, using finer lead pitch with leads formed as either gull-wing or J-lead, as exemplified by small-outline integrated circuit—a carrier which occupies an area about 30–50% less than an equivalent DIP, with a typical thickness that is 70% less. [6]
A reflow oven is a machine used primarily for reflow soldering of surface mount electronic components to printed circuit boards (PCBs). In commercial high-volume use, reflow ovens take the form of a long tunnel containing a conveyor belt along which PCBs travel. For prototyping or hobbyist use PCBs can be placed in a small oven with a door.
Surface Mount Technology Association (SMTA). ISBN 978-0-98888731-2. Tarr, Martin (2013). "Screen and stencil printing". Online postgraduate courses for the electronics industry. UK: University of Bolton. Archived from the original on 2014-05-28. Padmanapan, Sakthivel (2014-05-30). "Workshop on SMT Stencils" (PDF). Chennai, India: Surface Mount ...