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Molybdenum Disc & Square | Pure Mo, TZM & MoLa

Reference: HTMO1082

Condition: New product

Molybdenum Discs & Squares in pure Mo, TZM, and MoLa for power semiconductor, thyristor, transistor, heat-sink, and electronic applications. Available in 99.9%–99.99% purity with custom diameter, thickness, flatness, parallelism, surface finish, and Ru, Rh, Ni, Ag, or Au coating options. Request a quote.

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Data sheet

Materials	Molybdenum metal/TZM/MoLa Alloy
Purity	99.9% - 99.99%
Standard	ASTM B386

More info

Heeger Materials supplies molybdenum discs and squares in pure molybdenum, TZM, and MoLa materials for power-semiconductor, electronic, thermal-management, vacuum, and precision-component applications.

Molybdenum combines high-temperature capability, relatively low thermal expansion, good thermal conductivity, and dimensional stability. These properties make molybdenum discs and squares useful as substrates, support components, thermal-spreader bases, and contact-related parts in selected semiconductor and electronic assemblies.

Surface coatings including Ruthenium (Ru), Rhodium (Rh), Nickel (Ni), Silver (Ag), and Gold (Au) can be reviewed according to electrical, joining, oxidation, contact, or assembly requirements.

Custom diameter, square size, thickness, flatness, parallelism, surface finish, holes, edge details, and coating requirements are available according to drawing and manufacturing feasibility.

Molybdenum discs are available in pure form or coated with materials such as Ruthenium (Ru), Rhodium (Rh), Nickel (Ni), Silver (Ag), Gold (Au), etc., using PVD or evaporation techniques. These discs serve as crucial contact materials in silicon-controlled rectifier diodes, transistors, and thyristors. With similar coefficients of thermal expansion (CTE) to silicon and moderate thermal conductivity, molybdenum is well-suited for large-area power devices that generate significant heat. Additionally, we offer Molybdenum Sputtering Targets.

Molybdenum (Mo) Disc/Square

Molybdenum (Mo) Disc / Square Selection Notes

Molybdenum discs and squares are selected according to material grade, purity, diameter or side length, thickness, flatness, parallelism, surface roughness, coating, edge condition, holes, and final application.

Typical uses include power-semiconductor substrates, thermal bases, spacers, test coupons, electrodes, vacuum components, heat-spreader components, and precision refractory-metal parts.

For quotation, please specify:

Material: Pure Mo / TZM / MoLa
Shape: Disc / Square
Diameter or Width × Length
Thickness
Dimensional Tolerance
Flatness
Parallelism
Surface Roughness
Coating: None / Ni / Ag / Au / Ru / Rh
Hole / Edge Details
Quantity
Application

Related Materials and Product Forms

For material comparison or adjacent product forms, browse molybdenum rods, molybdenum plates, tungsten products and molybdenum products.

Material Options

Material	Main Characteristics	Typical Selection
Pure Molybdenum	High purity, low thermal expansion, good thermal conductivity	Semiconductor, electronic, thermal and general precision parts
TZM	Higher elevated-temperature mechanical strength than pure Mo	Mechanically demanding or higher-load applications
MoLa	Improved structural stability at elevated temperature	Selected high-temperature and thermal applications

For semiconductor base or contact applications, material selection should also consider thermal expansion, coating, joining method, surface condition, and device design.

FAQ

Can Molybdenum (Mo) Disc / Square be customized? Yes. Heeger Materials can review custom sizes, purity or grade requirements, tolerances, drawings, quantities and application conditions for this product.

What molybdenum disc sizes are available?

Current standard disc capability is approximately 5–150 mm diameter and 0.2–12.0 mm thickness, with custom sizes available according to material and tolerance requirements.

What materials are available?

Pure molybdenum, TZM, and MoLa are currently available for discs and squares.

What purity is available?

The current product range lists 99.9%–99.99% purity.

What flatness and parallelism can be achieved?

The current disc specification lists flatness below 0.005 mm and parallelism below 0.01 mm. Tighter or custom requirements should be confirmed according to dimensions and manufacturing feasibility.

Can molybdenum discs be plated?

Yes. Current coating options include Ru, Rh, Ni, Ag, and Au. Please specify the required coating material, thickness, coated area, and final application.

What are molybdenum discs used for?

Common applications include SCRs, transistors, thyristors, power-semiconductor assemblies, and selected IC, LSI, and hybrid-circuit thermal base components.

What information is needed for a quote?

Please provide material, purity, dimensions, tolerances, flatness, parallelism, surface finish, coating, hole or edge details, quantity, and a drawing if available.

Molybdenum Disc Specifications

Size: 5-150mm diameter x 0.2-12.0mm thickness, tolerance: ±0.025mm
Flatness: <0.005mm
Parallelism: <0.01mm
Roughness Ra<0.063mm
Plating: Ru, Rh, Ni, Ag, Au, etc.
Material: Mo, TZM, MoLa alloy

Molybdenum Square Specifications

Molybdenum Square	25 - 100mm Width/Length	0.5 - 1.5mm Thickness
Flatness Tolerance	< 4um
Roughness	Ra 0.8

Molybdenum Square

Molybdenum Disc/Square Applications

Silicon Controlled Rectifiers Diodes
Transistors
Thyristors (GTO's)
Heat Sink Bases in IC's, LSI’s, and Hybrid Circuits

Molybdenum Disc/Square Packaging

Molybdenum discs and squares are packed in protective export packaging with suitable separators and soft supports to reduce movement, edge damage, scratching, and surface contact during transportation.

Precision-ground, coated, polished, or tight-flatness components can be individually protected according to customer requirements.

Molybdenum (Mo) Disc/Square Packing

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Product Data Sheet_Mo, TZM, MoLa

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