RFQ Checklist
- Provide CAD drawings
- Specify operating voltage/current
- Define maximum operating temperature
- Identify working atmosphere
Custom-machined graphite heating elements for semiconductor furnaces. Delivering uniform thermal profiles and extended lifespan in harsh vacuum and inert gas environments.
| Metric | Typical Range | Why It Matters |
|---|---|---|
| Resistivity Variance | < 5% | Ensures uniform heating zone. |
| Graphite Grade | Isostatic or fine-grain graphite by load and geometry | Grade selection controls strength, machinability, resistivity, and hot-zone life. |
| Machining Tolerance | +/-0.01 mm to +/-0.10 mm by feature | Assembly interfaces, heater slots, and shield gaps need different inspection levels. |
| Atmosphere Fit | Vacuum or inert gas, oxidation risk reviewed separately | Graphite performs best when oxygen exposure and cleaning chemistry are controlled. |
| Decision Factor | Selection Logic | Buyer Check |
|---|---|---|
| Heat generation or shielding role | Heaters need resistivity and wall-section control; shields and supports need stability and fit. | Separate electrical, thermal, and mechanical CTQ features on the drawing. |
| Assembly interface | Graphite hot-zone parts should be selected as a matched assembly when gaps affect heat loss or arcing risk. | Provide chamber size, mating parts, power supply, and installation clearances. |
| Atmosphere exposure | Vacuum and inert gas are baseline; oxygen, water vapor, or aggressive cleaning steps require extra review. | Define atmosphere, ramp rate, cleaning method, and maximum temperature. |
| Stage | Production / QC Checkpoint | Buyer Evidence |
|---|---|---|
| 1. Assembly review | Map heater, shield, insulation, support, and chamber interfaces before quoting. | Hot-zone layout, mating-part drawings, power data, and atmosphere notes. |
| 2. Material routing | Select graphite grade by resistivity, strength, machinability, and cost target. | Grade recommendation and risk notes for high-stress or high-current features. |
| 3. Machining control | Control wall thickness, slots, bolt holes, shield gaps, and fragile edges. | Dimensional report for assembly and electrical CTQ features. |
| 4. Fit and surface check | Inspect cracks, chips, surface finish, and installation-critical dimensions. | Visual and dimensional acceptance record. |
| 5. Export protection | Pack heaters, shields, rings, and hot-zone parts against vibration and edge damage. | Foam-nest or crate plan for fragile assemblies. |
Yes, we select graphite grades and machine to precise cross-sections to match target resistance.
Share the process role of the part, not only the drawing. Heating, shielding, support, and insulation interfaces require different graphite properties and inspection focus.
Yes, but a worn sample should be paired with chamber dimensions, mating-part photos, and operating conditions so reverse engineering does not copy wear damage.
Most programs use dimensional reports for CTQ features, visual inspection for chips or cracks, and packing photos for fragile export shipments.
Inquiry Email
Include process, product type, drawing status, purity/coating target, dimensions, quantity forecast, operating conditions, and delivery date.
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+8618857971991
Best for quick drawing checks, process fit questions, and RFQ clarification.