Production Techniques for M.I.C.´s

Using microwave integrated circuits broadband radio equipment has been substantially reduced in size. Each M.I.C. is composed of sub-systems such as filters, circulators, iso-circulators and mixers defined on single substrate which is manufactured by simple methods using production techniques. These techniques produce alumina/ferrite substrates flat to 25¿m over 5Omm, gold deposited thin films and rapid alignment of batches of substrates to the circuit pattern. The thin film patterns produced are within dimensional tolerance of ±100¿m while still resulting in M.I.C.´s which function within their electrical performance limits. These techniques have been applied for circuits operating up to 7GHz, future work will take this frequency to llGHz.