Archives: Landing Domains

Technical information on:

• Quartz wafers
• Wafer dicing
• Fused Silica
• Thin optical materials
• Optical glass
• Optical components

Web Sites with Optical Technology Information:

• https://valleydesign.com/quartz-silica/fused-quartz/ Fused Silica and fused quartz substrates
• https://valleydesign.com/quartz-silica/polished-substrates/ Fused Silica substrates and windows

American Optical Society

• All associated web pages including Valley Design.com that contain Optical materials.

Return to Home Page: Fused silica and fused quartz substrates, wafers and disks

In light pipes light enters and reflects from the walls, at the glass-air boundary an indeterminate number of times until it emerges. Fused silica and BK7 will absorb in some parts of the electromagnetic spectrum. Designed to channel light from one end to the other through TIR (Total Internal Reflection), light pipes are also called homogenizers, waveguides and integrator bars.

The amount of absorption depends on:

• The wavelength
• Mass of material in the absorption path
• Absorption of fused silica or BK7 at a specific wavelength

Light Pipe Specifications:

Material		BK7 or fused silica (other optical materials also available)
Dimensional Tolerances		Length: ± 0.1 mm typical
		Ends: ± 0.05 mm typical
Surface Scratch/Dig		60/40 or as required
Clear Aperture		All edges sharp
Edge Chips		Less than 0.1 mm or as required
Parallelism		Less than 3 arc minutes

Rectangular and tapered light pipes are available in a variety of custom sizes. Please call or email for a quotation to meet your specifications.

Other custom sizes are 5″ x 5″ x 0.090″, 5″ x “5” x 0.180″, 5″ x 5″ x 0.250″, 6″ x “6 x 0.150″, 6″ x 6″ x 0.250″, and 7.25″ x 0.150″ round with 1.00” flats on each side.

Valley Design Corp. is an ISO 9001:2008 Certified company, supplying precision lapping, thinning, polishing, backgrinding, hole drilling, wafering, and dicing services for optics, photonics, semiconductor, medical, aerospace and research industries. Sapphire, Quartz, Metals such as Stainless Steel and Aluminum, Silicon, Aluminas, Ceramics, Glass, and many other materials processed.

Visa, Master Card, American Express, and purchasing cards accepted.

Fused Silica and Fused Quartz from the world’s best and most reliable suppliers. Borosilicate glass such as AF-45, D263, 7059 and Borofloat featuring excellent thermal resistance, low CTE and excellent optical transmission. B270 Crown Glass is a high temperature material with uniform optical transmission characteristics in the visible spectrum as well as in the IR and UV regions. 1737F is a near zero alkali aluminosilicate optical glass economically priced and withstands rigorous thermal cycles.

Other optical glasses include BK7, filter glass, Pyrex, Zerodur, 0211, 7070 and 7740 glass as well as other materials including Silicon, Sapphire, Germanium, GaP, GaAs, Garnet, ZnSe and ZnS.

Metrology instruments include 3D measurements, Laser interferometry, profilometry, and the new non-contact Indars Flatness Interferometer.

Please call or e-mail for a quotation to meet your specifications.

GE Clear Fused Quartz

GE 124 clear fused quartz, for quartz wafers and substrates, is produced from silica sand by electric fusion and therefore has a UV cutoff for 1mm thickness at <160 nm, a slight absorption at 245 nm and no appreciable absorption at 2.73 micrometers due to hydroxyl ions. Due to limited availability of this material, in many applications, Fused Silica can be substituted. The main differences are that Fused Quartz has much lower OH content (>100ppm) and Fused Silica transmits better in the UV range.

For Properties of GE124 Fused Quartz click here:

• Physical Properties
• Mechanical Properties
• Optical Properties
• Thermal Properties
• Electrical Properties

Fused Quartz Wafers and Substrates

Wafer and substrates can be processed as large as 12″ square or 12″ diameter with almost perfect surface finish of >10/5 or 5-10 Angstroms. Due to limited availability, Valley does not currently stock GE124, however we can source the raw material, or process customer supplied material. Standard sizes are 2″ diameter, 3″ diameter, 100mm diameter, 125mm diameter, 150mm diameter, 200mm diameter and 300mm diameter. Other sizes and squares can also be processed. Thicknesses range from ultra-thin < 100um to 250um, 500um, 1mm, 1.5mm, 2mm and up. Custom thicknesses and sizes are also available.

AlN Substrate Typical Chemical Analysis

How Aluminum Nitride substrates are manufactured.

For more information:

• https://valleydesign.com/aluminum-nitride/polished Polished AlN Aluminum Nitride substrates and wafers
• https://valleydesign.com/custom-dicing/aln-links/ Aluminum Nitride substrate related Web sites
• www.acers.org American Ceramic Society
• www.edgepolishing.com/aluminum-nitride Aluminum Nitride AlN mechanical and physical properties
• https://valleydesign.com/laser-slag/aln/ Aluminum Nitride laser slag
• valleydesign.com/substrate Aluminum Nitride Ceramic substrates

Partial cut and break services are offered or 100% saw through on tape or other carrier. ESD protection available when required.

Precision Wafer Dicing Request for Quotation

Wafer and substrate dicing services for of standard materials like glass, quartz and silicon or need to develop dicing and cutting procedures for untried materials, Engineering will work with you to achieve your quality and product goals.

Required wafer dicing information:

• Description of material to be diced?
• Is ESD protection required?
• Is a print available?
• Are dimensions in mm or inches?
• Starting material length, width or diameter and thickness?
• Starting quantity?
• Finished piece, chip or die size and expected yield?
• Tolerances and maximum allowable edge chip size?
• Is there a pattern or metalization? Is it a step and repeat?
• Allowed blade thickness, kerf or street width?
• Is there a preferred mounting technique?
• Are the surfaces protected? Do the surfaces need a protective coating?
• Can the pieces be left mounted?
• If it is left mounted and cleaned, what special instructions?
• Delivery requirements?
• Is there a budget?

Precision Wafer dicing Web sites:

• https://valleydesign.com/sitemap/ Wafer custom dicing
• www.imaps.org International Microelectronics and packaging Association
• https://valleydesign.com/ceramic-substrates/ Dicing hybrid and semiconductor circuits, prototype and production
• https://valleydesign.com/custom-dicing/thin-dice/ Thin dice by thinning after dicing

No value is Ordinary ray in C-axis direction and Ne value is for Extraordinary ray perpendicular to C-axis. Birofrinqence (No-Ne) for sapphire is 0.008.

Informative Related Sapphire Web Sites:

• https://valleydesign.com/sapphire-wafers/ Sapphire wafers and substrates
• https://valleydesign.com/sapphire-wafers/sos-sapphire R-plane sapphire for SOS silicon-on-sapphire
• https://valleydesign.com/sapphire-wafers/sapphire Synthetic monocrystalline sapphire
• https://valleydesign.com/sapphire-wafers/c-plane-sapphire C-plane sapphire windows, plates and substrates
• valleydesign.com/sappprop.htm Sapphire electric, thermal and mechanical properties
• valleydesign.com/sapppic.htm Sapphire optical properties and sapphire optical transmission
• https://valleydesign.com/ultra-thin/sapphire-window Sapphire ulta-thin, disks, wafer, windows and substrates
• flatlapping Lapping and precision polishing
• https://valleydesign.com/optical-glass-filters Polished colored glass filters and laser protection windows and shields

Please call or e-mail for details (quantities and pricing may be subject to change)

Typical specifications for EPI polished wafers for GaN deposited LED’s and other applications

 

• https://valleydesign.com/sapphire-wafers/sos-sapphire R-plane sapphire for SOS silicon-on-sapphire
• https://valleydesign.com/sapphire-wafers/disco-dicing Disco dicing saws and dicing blades
• https://valleydesign.com/sapphire-wafers/sapphire Synthetic monocrystalline sapphire
• https://valleydesign.com/sapphire-wafers/dicing Dicing wafers and substrates