A method of producing electronic basic blocks with a high degree of compaction and basic blocks produced according to method

摘要

A flexible printed circuit card (21a, 21b) is produced by providing a flexible card material (11) with folding indications (12a, 12b, 12c) extending wholly or partly through the card and the card material (11) is covered at least on one side with a foil. Electronic components (13) are attached to the card material, and the circuit card is perforated or cut out of the card material. The folding indications (12a, 12b, 12c) enable the flexible card to be folded with sharp, minimum radius corners, which makes it possible to mount integrated circuits (13) and components very close to the edges or corners of the card. When the card material (11) is folded along the folding indications (12a, 12b, 12c) to form an enclosed basic block, a number of tabs (22, 23, 24, 25) are formed which are substantially connected with each other by the foil. The folded carrier also forms at least one partially enclosed space that can be filled with a dielectric cast compound, thereby encasing all the components (13) of the basic block and protecting them against relatively rough treatment of the unit.