Laser programmable logic The idea is 20-25 years old, though technology has enabled to manufacture the arrays from 1995 on. In the beginning (IBM 1979) the technique was used to repair memories. The faulty word was burned out and replaced with a reserve line in the memory array. The advantage of LPGA (Laser Programmable Gate Array) over ASIC (Application Specific Integrated Circuit) appears in: Short time for manufacturing the prototype; Relatively low price of the prototype. LPGA is similar to MPGA (Mask Programmable Gate Array) from its electrical parameters. In case of larger series it is easy to switch to MPGA technology. Relatively good density when compared to FPGA. . LPGAtechnology The unnecessary connections are burned in the programming process. The manufacturer is Chip Express (USA). The same technology was used by Lucent Technologies. Before programming After programming LPLD/LASICtechnology LPLD – Laser-Processed Logic Device LASIC – Laser-Configured Aplication Specific Integrated Circuit Manufacturer: Clear Logic Compatible with the Altera Flex series of FGPA-s Vertical Link –decreases considerably the necessary chip area. Formation of the connection Capacity of the laser The laser is too weak - a gap filled with melting metal has not formed between two metals and there is no connection. The laser has suitable capacity – the gap has been formed and it is filled with melting metal. The laser is too strong – the gap filled with melting metal has been formed next to the connection.