Abstract: A surface-mount type crystal unit includes a package body which is made of a laminated ceramic and has a bottom wall layer and a frame wall formed on the bottom wall layer, the frame wall layer having an opening. In the package body, a concavity is constructed of the opening. The crystal unit further includes a pair of crystal holding terminals formed on one end part of the inner bottom surface of a concavity which is a top face of the bottom wall layer; a crystal blank held in the concavity by fixing the both sides of the one end part of the crystal blank to the pair of crystal holding terminals; a thermistor; and a cover which closes the concavity. The thermistor is arranged in a hollow part arranged in the top face of the bottom wall layer in the concavity.

Abstract: A surface-mount type crystal unit includes a package body which is made of a laminated ceramic and has a bottom wall layer and a frame wall formed on the bottom wall layer, the frame wall layer having an opening. In the package body, a concavity is constructed of the opening. The crystal unit further includes a pair of crystal holding terminals formed on one end part of the inner bottom surface of a concavity which is a top face of the bottom wall layer; a crystal blank held in the concavity by fixing the both sides of the one end part of the crystal blank to the pair of crystal holding terminals; a thermistor; and a cover which closes the concavity. The thermistor is arranged in a hollow part arranged in the top face of the bottom wall layer in the concavity.