■For AT-Cut Crystal Unit (for Machining)
This is the most common synthetic quartz crystal for AT-cuts.
We manufacture as-grown quartz crystals for use in a variety of AT-cut wafer sizes.
We provide synthetic quartz crystals in various sizes to meet your design needs, from small wafers to large wafers.
■For Tuning Fork Crystal Unit
This is a synthetic quartz crystal ideal for tuning fork crystal unit wafers. We manufacture using seed crystals with orientations from 1° to 3.5°, so we can provide synthetic quartz crystals that match the design of your devices.
We also offer lumbered raw stone machined into 3 inch and 4 inch squares, as well as into Φ3 inch, Φ4 inch, and Φ6 inch sizes, upon request. This will help you reduce wafer processing costs.
These synthetic quartz crystals are manufactured under thorough quality control, with minimal internal defects and foreign matter density. They can be used in a wide range of applications, from quartz crystal units for mass production to quartz crystal units for safety control devices.
Synthetic quartz crystals for tuning fork quartz crystal units are made from seed crystals controlled by etch channel density. Wafers produced from these synthetic quartz crystals have low etch channel density and can be used safely for photolithography processing. The etch channel density satisfies the Grade 1 quality standard specified in the "JIS C 6704" synthetic quartz crystal quality standard.
The foreign material density and the α3585 value respectively satisfy the Grade II and Grade C standards of the "JIS C 6704" synthetic quartz crystal quality standard.
■As-Grown Quartz Crystal
As-Grown is a synthetic quartz crystal grown naturally with no processing.
The dimensions can be freely selected according to the intended use in order to obtain high yields for wafer cutting.
■Lumbered Synthetic Quartz Crystal
Lumbered synthetic quartz crystal is a synthetic quartz crystal with X and Z planes machined to specified dimensions and angles.
The surfaces of lumbered synthetic quartz crystal are machined with high precision, enabling accurate wafer cutting.
The crystal orientation (Z-plane angle) for tuning fork crystal units can be selected from 1° to 3.5°.
■Block Outline Drawing
◆Precautions for Use
Make sure to read the following carefully before using synthetic quartz crystals:
Crystal quartz changes from α crystal to β quartz crystal at a temperature of 573℃ because of phase transition. This phase transition is reversible, but transition from β quartz crystal to α crystal does not take plase homogeneously, and twins are created. Therefore, careful attention must be paid to never allow the temperature to rise above 573℃.
Synthetic Quartz Crystal