SiC PVT Crystal Growth

Comprehensive graphite thermal-field solutions for 6-inch and 8-inch Silicon Carbide PVT crystal growth. Achieving ultra-low impurities and stable thermal gradients at >2000°C.

Target Buyer:SiC wafer manufacturers aiming to improve yield and reduce defect density.

SiC PVT crystal growth graphite crucible and hot zone component 1

Solution Highlights

<10ppm ash content materials
Coordinated hot zone supply
Stable thermal profiles

Common Use Cases

6-inch SiC PVT
8-inch SiC PVT

Implementation Focus

Thermal gradient optimization
Contamination elimination

Application Evaluation Matrix

Evaluation Metric	Typical Range	Buyer Relevance
Impurity Level	< 5ppm achievable	Directly impacts crystal quality.
Bulk Density	1.80 - 1.92 g/cm3 by grade	Higher density reduces open porosity and vapor penetration during SiC PVT growth.
Trace Metal Controls	Buyer-defined Fe, V, Ti, Al limits	Trace metals can enter the boule or wafer process if purification limits are vague.
Critical Interfaces	Drawing-defined OD, ID, thread, lid, and seal tolerances	Fit errors change thermal gradients and can shorten the replacement cycle.

Application Selection Logic

Decision Factor	Selection Logic	Buyer Check
Purity boundary	Use purified graphite when the part is exposed to SiC source vapor, seed-zone gradients, or high-temperature sublimation.	Request ash and trace-metal limits, especially Fe, V, Ti, Al, and Ca.
Thermal geometry	Prioritize drawing fit, lid interfaces, ring gaps, and wall thickness over generic crucible dimensions.	Send OD, ID, height, thread, groove, and mating-part drawings together.
Replacement cycle	Choose grade and purification route around the real number of growth runs expected per part.	Share current cracking, erosion, or contamination failure photos if available.

Application Delivery and QC Flow

Stage	Delivery / QC Checkpoint	Buyer Evidence
1. Requirement freeze	Confirm furnace type, growth temperature, crucible interfaces, and purity target.	RFQ sheet with CAD, material grade, ash limit, and replacement-cycle goal.
2. Graphite selection	Match isostatic graphite density, grain size, and purification route to PVT risk.	Grade proposal with density, grain-size class, and ash-control plan.
3. CNC machining	Machine sealing faces, grooves, threads, and assembly features from approved drawings.	First-article dimensional report for CTQ features.
4. Purification and QA	Apply purification and verify trace-metal or ash acceptance criteria.	COA or agreed trace-element report by lot.
5. Clean packing	Protect machined graphite surfaces from dust, edge impact, and moisture.	Packing photos, labels, and export documents before shipment.

RFQ Preparation Checklist

Crucible design
Insulation thickness
Furnace power specifications

Risk and Mitigation

Micropipe defects in crystal: Ultra-pure graphite to eliminate foreign particles.

Recommended Products

SiC PVT crystal growth graphite crucible and hot zone component 2

SiC PVT crystal growth graphite crucible and hot zone component 3

Rigid carbon felt insulation for SiC PVT furnace hot zone 1

Rigid carbon felt insulation for SiC PVT furnace hot zone 2

Buyer FAQ

Do you purify the machined parts?

Yes, parts undergo high-temperature halogen purification post-machining.

Which specifications matter most for SiC PVT graphite parts?

Start with ash and trace-metal limits, graphite density, grain-size class, CTQ dimensions, and the expected replacement cycle inside the PVT hot zone.

Should purification happen before or after machining?

For semiconductor hot-zone parts, purification is usually planned after machining so finished surfaces and complex features are included in the cleanliness route.

What should we send if the current crucible is failing early?

Send drawings, operating temperature, atmosphere, run count, failure photos, and any contamination data so the grade and purification route can be adjusted.

Related Resources

From Application Review to RFQ

Select matching graphite, SiC coated, or C/C products for the validated process window.
Review purity and ash-control capability before specifying trace-metal acceptance criteria.
Prepare drawing-based custom part inputs including CAD files, tolerances, surface finish, and volume forecast.
Send an application RFQ with furnace model, temperature, atmosphere, replacement cycle, and destination country.

Inquiry Email

[email protected]

Email app

Include process, product type, drawing status, purity/coating target, dimensions, quantity forecast, operating conditions, and delivery date.

Instant Chat

+8618857971991

Chat on WhatsApp

Best for quick drawing checks, process fit questions, and RFQ clarification.