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Why Polyimide?

• Low dielectric constant
• Flexible
• Polishable to Angstrom level surface finishes
• Excellent dimensional stability
• Low water absorption
• High temperature stability
• Excellent machinability
• Low outgassing and non-contaminating
• Exceptional mechanical strength
• Low coefficient of thermal expansion

Polyimide wafers polished on one side with 5nm Ra surface finish available from stock:

PART #	THICKNESS	DIAMETER
PI – P1 – Ø2X020	0.020″	2″
PI – P1 – Ø3X020	0.020″	3″
PI – P1 – Ø100XØ500	500 µm	100 mm
PI – P1 – Ø150XØ500	500 µm	150 mm

Valley Design’s special polyimide processing capabilities:

• Ultra-thin wafers to 50 micrometers
• Tight thickness tolerances
• Double side polishing
• Complex shapes
• Small diameter holes
• Precision dicing
• Large geometry polishing capability

Please call or email for a quotation to meet your requirements.

Valley Design Corp. manufactures polished polyimide wafers under license from Opticomp Networks US Patents No. 6, 563, 998 and 6, 807, 328.

Other superpolished optical components include:

• Copper Optical Mirrors
• Molybdenum Optical Mirrors
• Brass Optical Mirrors
• Nickel Optical Mirrors
• 17-4 PH Stainless Steel Optical Mirrors
• 304 Stainless Steel Optical Mirrors
• Laser Mirrors
• Space Optics

Best Achievable Metal Optics Surface Finishes:

• 303 Stainesss Steel – < 50Angstroms
• 304 Stainless Steel – < 15 Angstroms
• 316 Stainless Steel – < 50 Angstroms
• 430 Stainless Steel – < 40 Angstroms
• 17-4 Stainless Steel – < 50 Angstroms
• Aluminum 6061 T6 – < 25 Angstroms
• Copper – < 50 Angstroms
• Nickel – < 50 Angstroms
• Molybdenum – < 100 Angstroms

Super fine finishes are also available on many other semiconductor and optical materials such as Silicon, Germanium, Indium Phosphide, Fused Silica, Pyrex, Optical Glasses, Ceramics, Sapphire, Silicon Carbide, Polymers, Crystals and numerous other materials including Stainless Steel wafers, substrates, and foils. Valley also stocks many of these materials.

Other related web pages:

• Metallic mirrors vs. pure metal mirrors
• Molybdenum metal polished mirrors and optics
• Polished stainless steel wafers
• Stainless steel mirrors from stock
• Stainless steel optics
• Stainless steel wafers and substrates

The process is stress free without thermal distortion and is suitable for ferrous and non-ferrous materials.

Typical double-sided lapping applications include:

• Precision piston rings
• Precision spacers
• Gage slacks
• Seals
• Computer components
• Engine components
• Pump components

Quality control and measuring instrument calibration to ISO 9001:2008 standards.

Achievable specifications by double-sided lapping for parallelism and flatness:

• Flatness: to 1/10 wave (0.0000023″)
• Parallelism: to 0.000010″/inch
• Size control: to ± 0.000020″
• Surface finish: to Angstrom levels – depending on material.

Related lapping metal parts websites:

• https://valleydesign.com/flat-lapping/end-effectors/ Robotic end effectors lapped and polished
• https://valleydesign.com/flat-lapping/single-sided/ Single-side lapping
• https://valleydesign.com/flat-lapping/double-sided/ Double-side lapping for parallelism and flatness
• https://valleydesign.com/flat-lapping/wafer-chucks/ Wafer chuck lapping and polishing
• https://valleydesign.com/stainless-steel-substrates Thin stainless steel substrates and wafers
• www.450mm-technology SEMI standard wafers up to 450mm diameter

Return to Home Page: Lapping, contract precision flat lapping and polishing

Polished colored glass filters can be used in place of thin-film coated filters as an economic alternative.

Advantages of colored & optical glass filters:

• Relatively low cost
• High stability under a variety of operating conditions
• Insensitive to the incident angle of light entering the filter
• Not prone to minor scratches and abrasions
• More resistant to chemical attack, fumes and contamination

OPTICAL GLASS FILTERS FROM STOCK

• 50 mm square x 1.0mm thick
• 50mm square x 2mm thick
• 50mm square x 3mm thick

For custom filter glass sizes, shapes, thicknesses and tolerances click here .

STANDARD COLOR FILTER GLASS SPECIFICATIONS

• Blue
• Infrared
• Neutral Density
• Ultraviolet-HU
• Ultraviolet-UV
• Wavelength Calibrated
• Green
• Heat Absorbing and Rising Color
• Orange
• Red
• Violet
• Yellow

Wafers and substrates can be processed from common stainless steels such as 304, 316 and 430 in diameters up to 300mm and larger. Commonly available SS wafer diameters to SEMI specifications include 1″, 2″, 3″, 100mm, 125mm, 150mm, 200mm and 300mm. Other readily available SS substrate sizes include 1″ sq., 2″ sq., 3″ sq., 4″ sq., 4.5″sq., 6″ sq., and 12″ sq.

Typical polished wafer thicknesses include 125um (.005″), 250um (.010″), 375um (.015″), 500um (.020″), 625um (.025″) and 1mm (.040″). In smaller geometries, parts are available in thicknesses as thin as 25um (.001″), and thinner in some instances. Thinner polished SS foils can be used as extremely flexible substrates. On critical stainless steel optics, polished surface finishes to less than 10 Angstroms are achievable.

Stainless Steel 300 Series, has excellent thermal shock resistance and mechanical robustness. Operating temperatures range from -270° to +400°C. Please call or e-mail for more details, or for a quotation per your specifications.

Other related web pages:

Metallic mirrors vs. pure metal mirrors
Molybdenum metal polished mirrors and optics
Polished stainless steel wafers
Stainless steel Optics
Superpolished metal optical components
Stainless Steel Surface Finish Data

Experience and ingenuity from highly qualified operators with a lifetime of lapping and polishing experience ensure that our customers’ lapping requirements for fast turnaround, competitive prices, and guaranteed quality are met.

Benefits of Precision Lapping and Polishing:

• Size control: ± 0.0005mm (0.000020″)
• Parallelism: 0.0005mm (0.000020″) depending on size
• Flatness: to 1/10 wave (0.0000023″)
• Surface finish: 3 Angstroms Ra polish possible on some materials.

Valley Design can provide emergency lapping and polishing services for same day delivery, or in production, very high quantities on a daily, weekly or monthly basis: metals, alloys, fused silica, glass of all types, quartz, ceramics, sapphire, graphite composites, titanium, crystals, semiconductor wafers in SEMI standard sizes up to 450mm diameter – we do it all. Valley also has many of these materials in stock .

Flat-lapping related web sites:

https://valleydesign.com/flat-lapping/end-effectors/ Robotic end effector lapping and polishing
https://valleydesign.com/flat-lapping/single-sided/ Single-side lapping for fast turnaround
https://valleydesign.com/flat-lapping/double-sided/ Double-side lapping for parallelism and flatness
https://valleydesign.com/flat-lapping/stainless-steel-wafers/ Wafer chuck lapping and polishing
https://valleydesign.com/stainless-steel-substrates/ Stainless steel substrates, wafers and optics
https://valleydesign.com/450mm-technology/ 450mm wafer technology in Silicon, Glass, Ceramics

Float zone Silicon from Topsil is in the Galileo spacecraft now orbiting Jupiter; it is in the Hubble Space Telescope in orbit around the Earth; it will be in the Genesis solar wind sampling project.

Valley Design is compiling possibly the most complete stock list of Float Zone Silicon in ingot form, as-cut wafers, etched wafers, lapped, and single and double sided polished wafers.

Total capabilities include prime wafers, monitor wafers, reclaimed wafers, junk wafers, 300 mm wafers, shaped wafers, thin wafers, bonded wafers, CZ and “you-name-it” wafers.

Return to Home Page: Polished silicon wafers and polishing services

Wafers and dice (chips), bumped or un-bumped, can be thinned to almost any thinness (approaching 10 microns).

The process typically starts with an evaluation order for a few prototype wafers or chips. This is absolutely necessary in order to clarify customer’s specifications and requirements and also to optimize a process that will produce highest yield.

For some applications, a slight polish or a few angstrom level polish on the backside of the thinned wafer will reduce stresses, thereby reducing breakage and increase product yields. Dicing prior to thinning is also an option.

Singulated chips also can be thinned and polished to any thickness and tolerance without compromising edge quality. For more information click here.

Additional information on related Web sites:

https://valleydesign.com/ultra-thin/ MEMS and bonded SOI ultra-thin Silicon wafers
https://valleydesign.com/custom-dicing/bonded-wafers/ Dicing bonded silicon wafers
https://valleydesign.com/silicon-wafers/ High purity and resistivity float zone FZ Silicon

Return to Home Page: Polished silicon wafers and polishing services

Return to Home Page:
Polished silicon wafers and polishing services

The company has made space application windows for Lockheed 12½” x 2½” x .0035″. Sapphire is an extremely pure material — 99.99% Al2O3 and windows made from Sapphire will wear up to five times longer than Quartz. Sapphire does not react to common industrial products like Hydrofloric, Hydrochloric, or Sulfuric acids, and for biomedical applications, Sapphire is often chosen because it does not react to body fluids.

Offered is a complete line of flat optical pieces as well as lapped, polished and diced substrates, in Ceramic materials, Sapphire, Quartz, Fused Silica and many glasses.

Sapphire related Web sites:
https://valleydesign.com/ultra-thin/ Ultra-thin Sapphire wafers and substrates
https://valleydesign.com/custom-dicing/sapphire/ Dicing of Sapphire substrates and wafers

 

Return to Home Page: Polished silicon wafers and polishing services