A nonconductive polyimide strip located at the end of the leads to be bonded. Its purpose is to maintain lead integrity from the time the component is excised until it is bonded in place. Keeper bars are typically formed during the excising process, and are mainly found on extremely fine pitch components.
KEEPER BAR
Meaning of KEEPER BAR in English
Electronics Terminology English vocabulary. Английский словарь терминологий электроники. 2012