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NTD Silicon

By adjusting the level of neutron radiation, material resistivity can be altered without introducing external dopants and therefore guaranteeing material purity. This NTD type Float Zone Silicon is available in <1-1-1> and <1-0-0> orientations as ingots and polished wafers.

Sample Listing of Polished NTD Silicon From Stock

3 inch Diameter Polished One Side
Lot No. Resistivity (ohm-cm) Thickness micron Quantity
2792-111-N 28-47 279 90
2793-111-N 28-44 279 2
6001-111-N 135-165 600 150
100 mm Diameter Polished One Side
5002-111-N 94-116 500 185
7302-111-N 180-220 730 250
7502-111-N 500-600 750 483

Please note: this is a sample listing of wafers in stock. In stock FZ Silicon in various forms for fast delivery.

Edge Rounding

A unique edging process could solve your microchip, window, and substrate corner rounding problems.

  • Edge rounding and chamfering
  • Edge shaping and beveling
  • Edge lapping and polishing
  • Edge deburring and blending
  • Laser slag removal – click here for more information
  • Sharp corner rounding and deburring
  • Prepare edges for circuit wraparound applications
  • Enhanced – via edge rounding and contouring

The degree of rounding is controllable to a few microns. This process is adaptable to most materials including Ceramics, Fused quartz-Silica, Glass, Silicon, Aluminum Nitride, hard metals, and various other hard and semi-hard materials.

FZ Silicon Wafer

Lot No. Resistivity (ohm-cm) Thickness-micrometers Quantity
838588-111-N 40-60 351 43
832822-111-N 45-70 495 135
810852-100-N 90-110 285 69
811073-111-N 99-121 450 24
811074-111-N 99-121 450 22
838297-100-N 200-300 495 170
810893-100-N 270-330 380 65
811078-111-N 306-374 800 14
810815-111-N 306-374 800 52
810816-111-N 306-374 800 55
838911-111-N 320-480 351 264
832992-111-N 400-800 480 844
832090-111-N 400-800 480 53
810672-111-N 115-945 470 56

Please note: this is a sample listing of wafers in stock.

Diamond Dicing

Silicon, Gallium Arsenide, Indium Phosphide, Alumina, Aluminum Nitride, Gallium Nitride, BK7, Pyrex, Ferrites, Quartz, Sapphire, Fused Silica, Glass and Metal Rods, Patterned Optics, Chip Capacitors, Chip Resistors, IC Chips, Laser Diodes, Ceramics, Glass, Silicon Carbide and numerous others.

Valley has been actively engaged in dicing these materials and products for over 25 years. Our recently expanded dicing facilities on both East and West coasts, allow us to handle prototype requirements up to high volume production quantities. We dice on tape or hard carrier, with or without frames.

Equipment: Disco dicing saws and other air bearing spindle dicing machinery can handle disks and squares up to 6″ in diameter or square, and as large as 6″ x 14″ rectangles.

Capabilities: We can handle materials up to 8″x 18″ and any thickness. Chip size as small as .005″ square. Kerf as low as .0008″ Delivery–as fast as 24 hours.

For a complete summary of our dicing capabilities click here.

Aluminum Nitride Links

Aluminum Nitride links for technical information, supplier lists, and material properties:

Typical Properties of Aluminum Nitride Substrates

Toxicity Nontoxic
Density 3.3 g/cm³
Hardness (knoop) 11.8 GPa
Moh’s Hardness 7 at 20°C
Flexure Strength 290 MPa
Modulus of Elasticity 331 GPa
Poisson’s Ratio 0.22
Thermal Conductivity 175 W/mk
Coefficient of Expansion 4.6 x 10E-6 (20 – 400°C)
Maximum Use Temperature 800°C Oxidizing
Dielectric Constant 20°C 8.9 at 1MHz
Dielectric Loss at 1MHz 20°C 0.0001 – 0.001
Resistivity >10E14 ohm-cm

Wafer Chucks

Precision vacuum chucks are manufactured to extreme flatness and parallelism, and some have mirror-like surface finishes. Porous chucks have Ceramic, Quartz or metal inserts which can loosen. Dicing chucks are often damaged during blade set up procedures as well as from blade or flange height/depth miscalculations. Eventually, the chuck’s vacuum seal surface may become scratched and pores may become clogged. Continuing to use a damaged chuck limits your company’s capabilities and compromises quality. Replacing a damaged chuck can cost thousands of dollars.

Reconditioning will restore your part to its original flatness and surface quality, giving years of added use at a fraction of the cost of replacement. Turnaround time, of only one to several days (depending on size and complexity of the part) will keep your machine downtime to a minimum.

Capacitors

Dicing saws are fully programmable and are equipped with microscope and video for precision alignment. The company’s capabilities extend your fabrication services, and help you to meet production deadlines as your requirements for kerf, chip specifications and delivery are satisfied.

Extensive stock of thin substrates that are ideal for thin and thick film chip capacitor and chip resistor manufacturing. These materials include 96% and 99.6% Alumina Ceramics, Aluminum Nitride, Fused Silica, Glass and many others.

For a complete summary of dicing capabilities click here.

Metals

Thicker metal parts also can be cut to your specifications. Depending upon the material, the dicing kerf may be as small as 0.001″. The company’s capabilities enable you to better handle production pressures and meet your requirements for kerf, specifications, and delivery.

For a complete summary of dicing capabilities click here.

Return to Home Page: Dicing hybrid, semiconductor and dicing MEMS wafers

Aluminum Nitride Substrates

Desirable properties of Aluminum Nitride as an electronic substrate:

  • High thermal conductivity
  • Low thermal expansion coefficient closely matching Silicon
  • Good dielectric strength
  • High electrical sensitivity
  • Low toxicity and therefore excellent replacement for BeO
  • Good shock and corrosion resistance
  • Low dielectric loss
  • High temperature stability
  • High flexure strength
  • Light weight
  • Resistant to wafer processing gasses and plasma erosion
  • Conducive to finishing operations such as lasering, lapping, and polishing
  • Substrate for direct bond copper DBC and filled vias
  • Good adhesion for thin and thick film applications
  • Uniform lapped and polished surfaces for resistor networks
  • Polished and lapped surface finishes to 1/2 micro-inch. Ra with minimum pullouts
  • Lapped surface finishes to 6 micro-inch. Ra.

Properties -Typical

Toxicity Nontoxic
Density 3.3 g/cm³
Hardness (knoop) 11.8 GPa
Moh’s Hardness 7 at 20°C
Flexure Strength 290 MPa
Modulus of Elasticity 331 GPa
Poisson’s Ratio 0.22
Thermal Conductivity 175 W/mk
Coefficient of Expansion 4.6 x 10-6° (20 – 400°C)
Maximum Use Temperature 800°C Oxidizing
Dielectric Constant 20°C 8.9 at 1MHz
Dielectric Loss at 1MHz 20°C0.0001 – 0.001
Resistivity >10E14 ohm-cm

Lapping

As leaders in materials processing for over 34 years, we offer precision lappingoptical polishing, dicing, optical edge/angle polishing, thinning, grinding, shaping and wafering services. Valley specializes in ultra-thin (as thin as 12.5 microns), ultra-flat (1/20 Wave) super-polishing (< 10/5 scratch/dig or 5-10 Angstroms) and tight tolerances (± 1 micron).

Applications and products include beamsplitters, DWDM filter substrates, glass blocks/rods/spacers, lenses, mirrors, prisms, SEMI standard dummy wafers, solar cells, waveguides, wedges, polarizers, bandpass filters, laser diodes. Valley Design’s products are used in fiber optics/photonics, telecommunications, aerospace, medical, semiconductor and research industries.

Valley enjoys extensive experience with a wide variety of materials, and is also willing to work with proprietary materials. Valley routinely processes Fused Silica, Glass, Quartz, AlN, Pyrex, 99.6% and 96% Alumina, Sapphire, AF45, BK7, B270, D263, LASFN9, 1737, 7070, Ceramics, Lithium Niobate, Borosilicates, Soda Lime, Crystals, Silicon and Metals. In stock materials include Fused Silica, Quartz, optical glass, color filter glasses, 99.6% Alumina, R-plane Sapphire, Aluminum Nitride and Float Zone Silicon.

Precision Lapping

Valley offers precision lapping of all materials and has developed a proprietary process to achieve minimal material stresses and highest yields. Depending upon the material, Valley has the capability to achieve flatnesses to ¼ lightband and parallelism to .000050″, and specializes in very tight tolerances. We lap all materials including Glass, Quartz, Ceramics, Metals, Silicon and many others. Valley processes parts as small as a few thousandths of an inch and up to 32″ and larger in diameter. Valley also has extensive experience with thinning circuited and bonded wafers to as thin as 50 microns. For a complete summary of Valley Design’s capabilities, please visit valleydesign.com.

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