The Company manufactures and assembles electronic products and electronic assemblies for OEMs. Finished products include consumer and sophisticated studio-quality audio equipment, telephones and telephone answering machines, computer peripherals such as local area network add-in cards, CD-ROM drives and sound cards, electronic toys, infrared remote controls and radar detectors. Assemblies consist of Painted Circuit Boards with passive (e.g. resistors, capacitors, transformers, switches and wire) and active (e.g. semiconductors and memory chips) components mounted on them.

In assembling printed circuit boards, Deswell purchases packaged boards with the active components already mounted and uses both Pin Through Hole Technology and Surface Mount Technology interconnection technologies to assemble the other components onto the PCBs.

SMT is the method of assembling printed circuit boards in which components are fixed directly into the surface of the board, rather than being inserted into holes. With this process, solder is accurately stenciled in paste form on pads located on the printed circuit board. The components are then placed into the solder paste and heated to the point of melting the paste to establish a strong solder joint. The SMT process allows for more miniaturization, cost savings and shorter lead paths between components. Additionally, it allows components to be placed on both sides of the printed circuit board, a major factor in the miniaturization process.