High Purity Alumina Molybdenum Metallized Ceramic Shim for
Electrical
Specification of metalized ceramic shim:
1. Size capability: min. size to be 1mm x 1mm, max. size to be
240mm x 280mm
2. Available material: Alumina(Al2O3), Aluminum nitride (AlN) and
Beryllia (BeO)
3. Forming methods: dry pressing, tape casting, slice casting, and
hot pressing
4. Typical thickness: 0.30mm, 0.50mm, 0.635mm, 1mm and so on
5. Tolerance: thickness with +/-0.05mm. Length and width with
+/-0.5mm or better
6. Surface finish: metalizing, polishing, lapping and so on
7. Secondary process: fine grinding, laser cutting and so on
The classical types of metallization:
1. Ceramic substrate + Silver (Ag) plating
2. Ceramic substrate + Molybedum (Mo-Mn) plating
3. Ceramic substrate + Copper (Cu) plating
Benefits of the metalized ceramic shim:
1. High voltage, high current and high-temperature resistance
2. Supply with different thickness of metallization as per
customers' need
3. Can achieve great adhesion with ceramic substrates, as well
compatible with plating
4. High thermal conductivity, up to 24 W/m.k at room temperature
5. With a low dielectric constant and small dielectric loss
6. High mechanical strength, flexural strength can be up to 338 MPa
7. Smooth surface free of bending, camber, and micro-cracks
8. Easy to be machined with precision dimensions and goods flatness
for multiple layers
9. High reliability under high humidity and high-temperature
working environment
10. Low coefficient of thermal expansion, less than 8 x 10 -6 from room temperature to 800℃
11. Excellent chemical stability, resistant to most strong acids
and alkalis, free of rust forever
12. Free of any hazardous substances, meet RoHS and REACH
regulation fully
13. Sufficient raw material supplying with competitive price
Description of metalized ceramic shim:
We carry out surface metallization with silver, copper, molybdenum
coating on the ceramic substrate. All these ceramic substrates
offer high brazing strength, electrical insulation, high mechanical
strength, chemical stability and so on.
Our facility make use of different technical ceramics to produce
ceramic substrates, including alumina, aluminum nitride, and
beryllia ceramics. These ceramic substrates are shaped by tape
casting, ISO pressing or Dry pressing with a very dense body.
A variety of different patterns, different configuration ceramic
metallised substrate are available to supply via laser cutting,
fine grinding and so on. All these metallized ceramic substrates
offer to tighten tolerance.
Applications:
Widely used in thick film circuits large-scale integrated circuits,
hybrid IC, semiconductor packages, chip resistors, networks
resistor, focusing potentiometer, power modules, power hybrid
circuits and other related fields of electronic industry.
Material Data. Sheet
| General | Property | Units | 99%Al2O3 | 95%Al2O3 | ZrO2 |
| Mechanical | Density | g/cm3 | ≥3.80 | ≥3.60 | ≥6.0 |
| Water absorption | % | 0 | 0 | 0 |
| Hardness | HV | 1700 | 1500 | 1300 |
| Flexural strength | Mpa | ≥338 | ≥320 | ≥1200 |
| Compressive strength | Mpa | ≥2240 | ≥2000 | ≥1990 |
| Fracture toughness | Mpa m 1/2 | 4-5 | 3-4 | 6.5-8 |
| Thermal | Max. service
temperature
(Non-loading) | ℃ | 1600 | 1450 | 1000 |
| CTE (20-800℃) | 1×10 -6 /℃ | 6.2~8.0 | 5.0~8.0 | 8.0~9.5 |
| Thermal shock | T(℃) | ≥200 | ≥220 | ≥300 |
| Thermal conductivity (25℃ ) | W/m.k | 29 | 24 | 3 |
| Specific heat | 1 x 10 3 J/(kg·K) | 0.78 | 0.78 | 0.46 |
| Electrical | Volume resistivity (25℃ ) | ohm.cm | ＞1 x 10 14 | ＞1 x 10 14 | ＞1 x 10 11 |
| Insulation strength | KV/mm | 18 | 18 | 17 |
| Dielectric constant (1Mhz) | (E) | 9.5 | 9.5 | 29 |
Other related metallized ceramic parts
We also produce lots of different types of metalized ceramic parts
besides ceramic metallised substrates.
Packaging proposal & Transportation methods
1. Vacuum packing with desiccant as an inner package;
2. Then, exported carton as an outer package.
3. Finally, it will be packed with a wooden case if needed.
4. We regularly use DHL, UPS, FedEx, and TNT to ship small parcels.
5. For large volume orders, we could ship it by sea as per
customers' needs.
FAQs( Frequently Asked Questions)
Q1: Is it available to produce customized products?
A: We always support custom-made metallic coated ceramic insulators
as per different dimensions, designs, metallization, and platings.
Q2. When can I get the price?
A: We regularly quote within 24 hours after we get your inquiry. If
you are in urgent need of getting the price, please call us or tell
us in your email so that we will proceed with your inquiry as a
priority.
Q3. How long can I expect to get the sample?
A: After you pay the sample charge and send us confirmed files, the
samples will be ready for delivery in 4 weeks. The samples will be
sent to you via express and arrive in 3-5 workdays. You can use
your own express account or prepay us if you do not have an
account.
Q4. How long does the whole procedure being worked out?
A: After you place an order, the manufacturing time is about 25
working days.
Q5. How to ensure quality?
A: The dimension out of any batch will be carried out sampling
inspection per International AQL standard. A 100% cosmetic
inspection will be done.
Q6. Are you a factory or trading company?
A: We are a professional manufacturer. We are warmly welcome
clients from worldwide to visit our factory and cooperate with us.
