Our SiC cutting solution uses an endless diamond wire saw with a 0.35 mm kerf — saving 60% of material lost to band saw dust, and recovering 2–3 extra wafers per ingot.
Silicon carbide (SiC) ranks 9.5 on the Mohs hardness scale — second only to diamond. Its combination of extreme hardness, brittleness, and high thermal conductivity makes it uniquely challenging to cut cleanly. Choosing the right SiC cutting solution is critical: the wrong method destroys the very material properties that make SiC valuable.
Both forms demand a SiC cutting solution that applies minimal cutting force to prevent micro-cracking — while delivering the geometry flexibility that sintered SiC industrial applications require.
Three methods dominate silicon carbide processing today. Understanding their trade-offs is the first step to selecting the right SiC cutting solution for your production volume, surface quality requirements, and material cost constraints.
| Metric | Band Saw | ID Cutting Disc | ★ Endless Wire Saw (Vimfun) |
|---|---|---|---|
| Kerf width | 1.0 – 1.5 mm | 0.3 – 0.5 mm | ✔ 0.35 – 0.45 mm |
| Cut surface quality | Wavy, rough | Good, limited size | ✔ Flat, Ra < 1.0 μm |
| Max workpiece size | Large | Small (< Ø 200mm) | ✔ Up to 800 × 800 mm |
| Cutting stress on material | High vibration | Medium | ✔ Low-force, cold cutting |
| Complex shape capability | ✕ Straight only | ✕ Straight only | ✔ 2D profiles & 3D tapers |
| ROI per SiC ingot | Baseline | Moderate gain | ✔ +2–3 extra wafers per ingot |
Video: Splitting a Silicon Carbide (SiC) Tube with Vimfun Endless Diamond Wire Saw
What makes Vimfun's SiC cutting solution different is the endless loop wire technology. The wire forms a closed circle running at up to 80 m/s — no reversal marks, no vibration spikes, and no directional inconsistency.
0.35mm wire vs 1.2mm band saw. On expensive SiC crystal, every millimeter of savings translates directly to yield.
Exceptionally flat cut surfaces reduce face-grinding time and preserve ingot length for more wafers per boule.
High linear speed delivers smooth Ra surface finish and consistent abrasive action across the full cut width.
SVI series machines handle SiC ingots up to 800 × 800mm — including 6-inch and 8-inch boules.
Profile cuts, taper cuts, and internal contour cuts — beyond straight slicing for complex SiC component shapes.
Send your SiC sample to Vimfun. Receive a full surface quality report and kerf measurement at no cost.
This video demonstrates how our SiC cutting solution extracts maximum value from sintered SiC material. From a single Ø150mm SiC disc, the SGI 20 cuts 7 circular wafer blanks of Ø47mm — using contour cutting to trace each wafer's profile precisely with minimal kerf loss between parts.
Silicon carbide's properties — high breakdown voltage, thermal conductivity, and electron mobility — make it essential across rapidly growing industries. Vimfun's SiC cutting solution is trusted by manufacturers in each of these sectors.
SiC-based power modules operate at higher voltages and temperatures than silicon, enabling smaller, lighter EV drivetrain components. Vimfun's wire saw produces wafer-ready SiC substrates with the surface flatness required for epitaxial growth.
Learn more about semiconductor SiC cutting →
In high-volume 4H-SiC production, the cropping stage is a primary source of material waste. Replacing a band saw with Vimfun's 0.35mm endless wire at this stage alone recovers 2–3 extra wafers per ingot — a significant yield improvement.
Read the fine wire slicing ROI analysis →
Sintered SiC is widely used in mechanical seals, semiconductor process fixtures, armor, and high-temperature structural components. Unlike crystal SiC, sintered SiC comes in large blocks and requires diverse cutting: straight slicing, outer contour cuts, and round wafer blank extraction from oversized material.
Vimfun's SGI 20 (contour cutting) and SH60-R (horizontal rotary) are specifically suited for this: the SGI 20 traces complex 2D profiles from sintered blocks, while the SH60-R cuts large-diameter circular wafer blanks from bulk material in a single rotary pass.
Explore SiC industrial cutting solutions →Crystal SiC and sintered SiC have different cutting requirements — and different optimal machines. The three models below cover the full range of Vimfun's SiC cutting solution: precision crystal wafer slicing, large sintered block contour and profile cutting, and horizontal rotary cutting for round wafer blanks.
Not sure which machine fits your requirements? Request a custom engineering consultation →
The best way to evaluate any SiC cutting solution is to see real results. Send SiC samples to Vimfun for a free test cut and receive a full surface quality and kerf measurement report.
Send your SiC material to Vimfun and receive a complete cutting test with surface quality report, kerf measurement data, and machine recommendation — at no cost.
Endless diamond wire saw is currently the most efficient SiC cutting solution available. With a 0.35mm wire diameter, this SiC cutting solution reduces kerf loss by 60% compared to band saws, while delivering a flatter cut surface (TTV < 0.02mm) that significantly reduces downstream grinding requirements.
Replacing a 1.2mm band saw with Vimfun's 0.35mm endless wire reduces kerf width by approximately 0.85mm per cut. On a 150mm (6-inch) SiC ingot, this translates to 2–3 extra wafers recovered per ingot. Given SiC crystal prices, this ROI typically pays back machine cost within months of production.
Yes — both types are well-supported, but they have very different cutting requirements. Crystal SiC (4H-SiC boules) primarily requires precision straight slicing to recover maximum wafers with minimum kerf loss. Sintered SiC requires more diverse operations: straight slicing, 2D contour cuts for shaped parts, and cutting round wafer blanks from large blocks. The SGI 20 handles contour and profile cuts; the SH60-R excels at cutting large-diameter circular blanks from sintered blocks via horizontal rotary cutting; the SG15 serves crystal SiC R&D and sample work.
Yes. Vimfun offers a free diamond wire test cutting service. Send your SiC sample with specifications, and our engineers will perform the cut and provide a detailed report on surface quality (Ra), kerf width, and TTV — with machine recommendations tailored to your production requirements.
Both are viable SiC cutting methods. Laser cutting generates a heat-affected zone (HAZ) that can alter SiC's crystal structure — a concern for semiconductor-grade substrates. Endless wire saw cutting is a mechanical, cold-cutting process that preserves crystal integrity, produces no HAZ, and offers significantly better material yield for ingot-scale cropping work.
Talk to a Vimfun cutting engineer about your silicon carbide processing requirements. Get a free test cut, a custom machine recommendation, or a detailed ROI analysis for your production line.
Don’t worry! We know that obtaining cutting machines that meet your needs can be very challenging. Our professional cutting experts are always available to support you: