Electric resistor and a power detector both comprising a thin film conductor

A power detector having a thin film conductor comprising:

• an insulating substrate;
• at least first and second thermocouples provided substantially in parallel on said insulating substrate, each thermocouple comprising a conductor film connected to an alloy film, said alloy film essentially consisting of silicon and germanium, in which amorphous and microcrystal phases coexist;
• the alloy film of said first thermocouple and the conductor film of said second thermocouple being located on the same side of said substrate, and the alloy film of said second thermocouple and the conductor film of said first thermocouple being located on another side of said substrate;
• each of said alloy film of said first thermocouple and said conductor film of said second thermocouple having a first electrode connected thereon;
• said conductor film of said first thermocouple having a second electrode connected thereon;
• said conductor film with said second electrode connected thereon having a third electrode which is connected thereto;
• a first beam lead electrode connected to said first electrode;
• a second beam lead electrode connected to said second electrode;
• and
• a third beam lead electrode connected to said third electrode.