ST-cut and AT-cut oriented seed bodies for quartz crystal synthe

Details ST-cut and AT-cut oriented seed bodies for quartz crystal synthe ST-cut and AT-cut oriented seed bodies for quartz crystal synthe

1997-12-15

1999-12-14

Kunemund, Robert

Single-crystal, oriented-crystal, and epitaxy growth processes;

Processes of growth from liquid or supercritical state

Having growth from a solution comprising a solvent which is...

117 71, 117902, 117943, 423335, C30B 710

Patent

active

060011718

ABSTRACT:
ST-cut and AT-cut quartz seed bodies (18,40) for quartz crystal synthesis and method (100) for making the same are disclosed. An extended quartz seed body (18) having an angle of about 42.75.degree. rotated about a X axis (20) from a +Z axis (22) to a -Y axis (24) and defining a ST-cut is provided and a quartz crystal bar (32) is grown thereupon. Analogously, an extended quartz seed body (40) having an angle of about 35.25.degree. rotated about a X axis (20) from a +Z axis (22) to a -Y axis (24) and defining an AT-cut is provided and a quartz crystal bar (48) is grown thereupon. In each case, the subsequent quartz crystal bar (32,48) may be wafered parallel to the seed body (18,40) thereby; reducing waste (68), recovering the seed body (18,40) for reuse, producing wafers (70) without intervening seed portions, and increasing factory capacity.

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