JPH0548428U - Crystal oscillator - Google Patents

Abstract

(57) [Summary] [Purpose] Displaying markings with laser processing ensures reliable and reliable markings. [Structure] There is a base 2 having a plurality of electrically independently provided terminal portions, a crystal plate having electrodes formed thereon is mounted on the upper portions of the terminals, and the base 2 and the cap 1 are hermetically sealed. In the child, the marking 5 displayed on the cap 1 is displayed by laser processing.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a marking structure for a crystal unit.

[0002]

[Prior Art]

 Conventionally, markings such as manufacturer, frequency, and manufacturing lot number on crystal units are arranged by parts feeders and aligned by linear feeders. After that, they were sent to a printing machine and imprinted with immortal ink, UV ink, etc. on the convex plate, and stamped one by one. Then, the stamped product is cured in an oven at about 160 ° C for about 1 hour.

[0003]

[Problems to be solved by the device]

 In the conventional marking structure in which ink is imprinted by a printing machine, the imprinting surface may have a bad ink transfer property, resulting in a decrease in printing yield, poor solvent resistance, and peeling of printing. The present invention has been made to eliminate these drawbacks.

[0004]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention has a base having a plurality of terminals that are electrically independent of each other, and an electrode-formed crystal plate is mounted on the upper part of the terminal. In the hermetically sealed crystal unit, the marking displayed on the cap was displayed by laser processing.

[0005]

[Action]

 Since the laser processing is made by digging the surface, reliable and reliable marking can be displayed.

[0006]

Embodiments of the present invention will be described with reference to the drawings. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a front view of FIG. 3 is a perspective view showing another embodiment of the present invention, and FIG. 4 is a plan view of FIG. 1 and 2, 2 is an elliptical metal base having through holes at both ends in the longitudinal direction, and the lead terminals 3, 3 are hermetically and insulatively sealed to each through hole via glass. There is. A support member is welded to the upper portions of the lead terminals 3 and 3, slits are formed in the support member, and a crystal plate with electrodes formed is mounted between the slits, and a conductive bonding material is used. Electrical opportunistic bonding is performed. The metal base 2 having the above structure is covered with the metal cap 1 to hermetically seal it. Then, a laser beam 4 is engraved on the surface of the metal cap 1 so that markings 5 such as manufacturer, frequency, and production lot number are displayed by laser processing.

From FIGS. 3 and 4, a ceramic base 7 is coated and baked with a metal film such as silver palladium to provide a conductive portion on the main surface of the ceramic base, and a drawer electrically connected to the conductive portion. The terminal portion 8 is provided on the side surface of the ceramic base 7. In addition, the quartz plate on which the electrodes are formed is electrically and opportunistically joined together with the supporting metal fittings by the conductive part and the conductive bonding material. The ceramic cap 6 is placed on the ceramic base 7 having the above structure, and the ceramic cap 6 is lightly pressed and fixed with a low-melting glass to hermetically seal. Then, the laser beam 4 is engraved on the surface of the ceramic cap 6 in order to display markings 5 such as the manufacturer, frequency, and manufacturing lot number by laser processing.

It is necessary to adjust the output of the laser light 4 in consideration of the material and the like so that it is not damaged more than necessary. Two-watt output is suitable for both the metal cap and ceramic case.

[0009]

[Effect of the device]

 Since the laser processing is made by digging the surface, reliable and reliable marking can be displayed. Therefore, there is no fear of solvent resistance failure, print peeling, etc., which were problems in the conventional marking structure for printing ink with a printing machine, and the printing yield can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a front view showing an embodiment of the present invention.

FIG. 3 is a perspective view showing another embodiment of the present invention.

FIG. 4 is a plan view showing another embodiment of the present invention.

[Explanation of symbols]

 1 Metal Cap 2 Metal Base 3 Lead Terminal 4 Laser Light 5 Marking 6 Ceramic Cap 7 Ceramic Base 8 Lead Terminal

Claims (1)

[Scope of utility model registration request] 1. A crystal resonator having a base having a plurality of electrically independent terminal portions, a crystal plate having electrodes formed thereon is mounted on the upper portions of the terminals, and the base and the cap are hermetically sealed. The crystal unit, wherein the marking displayed on the cap is displayed by laser processing.