Electronic-grade polycrystalline silicon (particles)

We make electronic-grade granular polysilicon with the silane fluidized bed technique. We take high-purity silane gas as raw material, heat and decompose it inside fluidized bed reactors, then get evenly shaped spherical silicon grains.
This granular silicon boasts ultra-high purity, good fluidity and steady quality across every batch. It works perfectly for continuous feeding during semiconductor single crystal pulling.
Unlike conventional lump polysilicon, these particles don’t need crushing before use. You can load them straight into automatic feeding equipment. This cuts contamination risks and lifts your overall production efficiency.
We tightly control all impurity levels under industrial benchmarks. The purity of our granular silicon hits 9N to 11N, fully matching the strict standards required for semiconductor manufacturing.

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Product Details

a) Product Features and Advantages

High purity level

Our granular electronic silicon reaches 9N to 11N purity. Donor impurities stay below 0.15 ppba, acceptor impurities under 0.10 ppba. Carbon and oxygen are both controlled under 0.05 ppma, fully matching strict semiconductor production standards.

No crushing step needed

Unlike lump polysilicon, these silicon grains can be put into use directly. You skip crushing work entirely, which stops extra impurities brought in during crushing. It also cuts labor and equipment costs for crushing procedures.

Great flow performance

All particles are round and even, with a standard size around 2 mm. They flow smoothly inside automatic feeding equipment. This works perfectly for continuous feeding CZ crystal pulling lines and greatly boosts overall production speed.

Stable quality across batches

We carry out full purity and quality checks for every batch. The composition stays consistent all the time. Clients can place large bulk orders without worrying unstable production caused by inconsistent batch quality.

Reliable stable supply

We have long-term cooperative ties with major domestic polysilicon factories including Tongwei, Tianhong, Shenggong and Youyan. All goods have clear traceable sources, and we can stick to scheduled delivery to avoid your production halt.

Good cost performance

Our price is much more competitive than imported silicon brands. You can cut raw material spending while keeping stable high purity quality.

b) Product Parameters

Product Name: Electronic Grade Granular Polysilicon (silane fluidized bed production)
Shape: Uniform spherical pellets, size range 0.8–2.5 mm, common size 2 mm
Bulk density: ≥1.2 g/cm³
Purity standard: Electronic grade, 9N to 11N
Volume resistivity: 100–300 ohm-cm, adjustable to meet your custom needs
Impurity limits: Donor ≤0.15 ppba; Acceptor ≤0.10 ppba; Carbon ≤0.05 ppma; Oxygen ≤0.05 ppma
Packaging: 5kg, 10kg, 25kg bags available, we can adjust packing specs as you request

Application Areas

Semiconductor single crystal pulling Fit for CZ crystal growth lines, especially workshops with automatic continuous feeding equipment. The pellets can be loaded into feeders directly. Mix them with lump polysilicon, and you will get higher crystal pulling efficiency and more flexible feeding operation.
High-efficiency solar cells Ideal for N-type TOPCon, HJT and other high-performance cell technologies. Consistent high-purity granular silicon helps raise solar cell conversion rate.
Silicon material blending for semiconductors Mix with lump polysilicon at a proper ratio to balance pulling efficiency and material cost, matching different factory production processes.

Frequently Asked Questions

Q: How do granular polysilicon and lump polysilicon differ?

A: Granular silicon is made via silane fluidized bed process. It forms smooth round pellets ready for direct use, flows well and fits automatic feeding. Lump silicon comes from improved Siemens method, forms irregular big blocks and needs crushing before use. Both types have their own strengths. You can pick one or mix both based on your workshop process.

Q: Does granular silicon bring metal impurities?

A: It won’t. We use ultra-pure silane gas as raw material, and the whole deposition reaction happens inside sealed fluidized bed reactors. We strictly block impurity introduction during every production step. Every batch will pass full heavy metal testing to meet electronic-grade requirements.

Q: What’s your minimum order quantity?

A: MOQ varies based on your actual demand. Reach out to our sales team to get exact price and MOQ details.

Q: How long is the lead time?

A: Standard in-stock goods take 7–15 working days after order confirmation. Exact delivery schedule changes with order volume, stock levels and shipping options. Better talk to our staff in advance to lock the timeline.

Q: Can I get samples for lab testing?

A: We offer test samples for clients. Sample supply is limited, contact our sales colleagues to finish sample application formalities.

Q: Can I receive material test reports?

A: Every shipment comes with full test documents, covering purity, particle size, resistivity and other core indicators. We can send the report by email ahead of delivery, or attach hard copies with your cargo.

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