Quartz Wafer Properties and Applications

Quartz is highly pure and therefore has high working and melting temperatures. Quartz wafers possess many unique features such as high anti corrosion, high optical transmittance, low dielectric loss, good thermal conductivity and high working temperature. Quartz’s cross-linked three-dimensional structure delivers exceptional UV transparency, thermal shock resistance, and near-zero thermal expansion. Quartz, due to its purity, thermal and optical properties is superior to those of other glass materials. Quartz is perfect for semiconductor fabrication and laboratory equipment.

Quartz monocrystals are produced with hydrothermal synthesis process. High quality broken pieces of quartz are placed at the bottom of the vessel filled with NaOH. Quartz crystallizes at a temperature of approx. 400°C and a pressure of 1000 - 1500 bar from a saturated NaOH solution at quartz seed crystals that have a lower temperature than the crushed source quartz at the bottom of the container. Quartz growth normally takes hours or days and forms monocrystals up to weight of several kilograms. The formed quartz monocrystals then are sliced into wafers and polished from one or both sides, dependent on application requirements.

Quartz wafer are fabricated in round or square shapes, with a SEMI flat or without flat, size from 1 to 12, thickness range from 0.4, 0.5, 0.7, 1.1 to 3 mm. Quartz is usually manufactured in different crystal directions which define the orientation of the wafer surface. Typical cuts are “X-Cut”, “Y-Cut”, “AT-Cut”, and “ST-Cut”.

Quartz Wafers are used in semiconductors.

Quartz Wafers are used in photomasks.

Quartz Wafers are used in microwave filters.

Quartz Wafers are used in optical lenses

Quartz Wafers are used in optical fibers.

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