Patent ID: 8415793

Claim:
A wafer for electronic component packages used for manufacturing a plurality of electronic component packages, each of the plurality of electronic component packages comprising: a base incorporating a plurality of external connecting terminals; and at least one electronic component chip that is bonded to the base and electrically connected to at least one of the external connecting terminals, the wafer comprising: a plurality of sets of external connecting terminals corresponding to the plurality of electronic component packages; a retainer for retaining the plurality of sets of external connecting terminals; and a coupling portion for coupling the plurality of sets of external connecting terminals to one another, the wafer including a plurality of pre-base portions that will each be subjected to bonding of the at least one electronic component chip thereto and will be subjected to separation from one another later so that each of them will thereby become the base, wherein the retainer incorporates: a base forming portion disposed in each of the pre-base portions; and a portion to be removed made of a material different from a material of the base forming portion and disposed around each of the pre-base portions, each of the external connecting terminals extending across the base forming portion and the portion to be removed.