Claims
- 1. A method for producing a substantially dislocation-free crystal seed material for use in the growing synthetic quartz, single crystal boules which comprises the steps of:
- (A) providing a synthetic quartz, single crystal boule with its length directed along a crystallographic Y-axis orientation, its width directed along a crystallographic Y-axis orientation, its thickness directed along a crystallographic Z-axis orientation and wherein said Z-axis defines a Z region of crystal growth and said X-axis defines an X-minus and an X-plus region of crystal growth;
- (B) slicing and removing the X-plus region of growth from said crystal boule;
- (C) slicing a plurality of seed crystals from said X-plus region of growth such that each of said seed crystals displays a substantially rectangular prism configureation having (1) two oppositely disposed and parallel Z face surfaces running perpendicular to the Z axis orientation and along the longitudinal direction of the rectangular prism, (2) a first edge surface running perpendicular to the X-plus axis orientation and along the longitudinal thickness of the rectangular prism, (3) a second edge surface oppositely disposed and parallel to said first edge surface running perpendicular to the X-minus axis orientation, and (4) third and fourth oppositely disposed and parallel edge surfaces defining the longitudinal dimension of said rectangular prism and running in a direction perpendicular to said crystallographic Y-axis orientation.
- 2. The crystal seed material produced by the method of claim 1.
STATEMENT OF GOVERNMENT INTEREST
The invention described herein may be manufactured and used by or for the Government for governmental purposes without the payment of any royalty thereon.
US Referenced Citations (4)
Non-Patent Literature Citations (2)
Entry |
A. F. Armington et al, J. Crystal Growth, 49 (1980) 739-742. |
A. F. Armington et al, 36th Annual Frequency Control Symposium, Marriott Hotel, Phila., PA, (2-4 Jun. 1952) 55-61. |