Uncooled focal plane array (UFPA) has broad application prospects in civilian and space because it's cheaper, more
compact and high reliability. Many research institutes and companies have carried out the research of uncooled focal
plane array. This paper shows a vacuum package design of UFPA, and its architecture will be given. The assembly is an
all-metal vacuum package, which has been proven rugged and reliable. Out-gassing, permeation, evaporator, and air leak
are factors to reduce the component vacuum lifetime. Theoretical analysis shows that material out-gassing is the main
factor of pressure rise inside package. Theoretical analysis and calculation show that designed metallic structure can
meet the need of 10-years life.