PURPOSE: To support a lead terminal and a vibration chip properly by applying hermetic seal to the lead terminal in the air with a 1st seal member made of a low melting point glass on a first cover, supporting the vibration piece to a 1st cover and applying air-tight seal to a 2nd cover with a 2nd seal member whose work temperature is comparatively low.
CONSTITUTION: A low melting point glass is used for a 1st seal member 4 and a resin adhesives is used for a 2nd seal member 5. At first the seal member 4 is coated to the ridge of a spacer 3 whose middle part made of a ceramic is opened, the seal member 4 is applied to a 1st cover made of an insulation material, the members are baked tentatively, a lead terminal 6 is arranged between the spacer 3 and the cover 1 and heated in air to form a base through integration. Then a vibration chip 8 is supported to a support of the lead terminal with a general epoxy group conductive paste 7 and conducted electrically, the 2nd cover 2 is sealed on the spacer 3 by a 2nd seal member 5 made of an epoxy group resin adhesives to constitute the crystal resonator. Thus, the reliability of the air-tightness is improved and the reliability of the support of the vibration chip is enhanced.
TANAKA ATSUSHI
KANEHARU SHINYA
