DFM for 3D Printing: A Practical Design Guide
Wall thickness, tolerances, supports, and hole sizing rules for printable parts.
Read the ArticleESD 3D Printing Material
Stereolithography (SLA) · Specialty Resins
Static-dissipative resin for electronics handling, fixtures, and ESD-sensitive assemblies.
What Is ESD?
ESD resin is a static-dissipative SLA material engineered for electronics manufacturing fixtures, chip trays, and any application where uncontrolled static discharge can damage sensitive components. At 42 MPa tensile, 1,900 MPa flex modulus, and controlled surface resistivity, it prevents charge buildup while maintaining genuine structural capability.
Formlabs ESD Resin, printed with Stereolithography (SLA). Every order is reviewed by our engineering team - no minimum order quantity.
When to choose ESD
Choose ESD resin when your fixture, tray, or enclosure will contact ESD-sensitive electronics. Its controlled surface resistivity (10⁶–10⁹ Ω) prevents the static discharge events that damage ICs, MEMS, RF components, and sensitive analog circuits. It is the only ESD-safe 3D-printed material in our catalog that delivers SLA-grade precision.
At 42 MPa tensile and 1,900 MPa flex modulus, ESD resin is structurally capable - it supports pogo-pin test loads, component insertion forces, and fixture clamping without flexing. The ±0.1 mm tolerance reproduces chip-pocket dimensions and alignment features that match production tooling.
If your part does not contact ESD-sensitive electronics, do not specify ESD resin - Grey V5 is stronger (62 MPa), stiffer (2,750 MPa), and costs half as much. For ESD fixtures that must handle higher temperatures (above 66 °C), consider machined ESD-safe plastics or discuss alternatives with us. For larger ESD parts beyond the 200 mm build envelope, FDM options with ESD-safe coatings may be appropriate.
Material Properties
Representative values - process- and orientation-dependent. Full technical datasheet available on request.
Process
Stereolithography (SLA)
Tensile strength
42 MPa
Elongation at break
5.5%
Flexural strength
65 MPa
Flexural modulus
1,900 MPa
Heat deflection (HDT)
66 °C @ 0.45 MPa
Density
1.25 g/cm³
Max build size
200 × 125 × 210 mm (Form 4)
Min wall thickness
0.5 mm
Resolution / layer
50–100 µm
Relative cost
$$$$ (1 = lowest, 4 = highest)
Design Guidelines
Plan features to print reliably and assemble cleanly in ESD. Need DFM help?
Min wall
0.5 mm - 0.8 mm+ for fixtures
Min feature
0.3 mm - at 50 µm layer height
Clearance
0.2–0.3 mm - for chip pockets and nests
Max size
200 × 125 × 210 mm - Form 4 build volume
Dimensional tolerances
Typical tolerance on the Form 4 is ±0.1 mm or ±0.1%. The filled formulation holds dimensions well during cure. For chip-tray pockets and alignment features, the SLA precision is adequate to match production tray dimensions. Verify critical pocket dimensions against component datasheets at DFM review.
Printing notes
ESD resin prints on the Form 4 at 50–100 µm layer height. Wash in IPA for 10–15 minutes after printing. Post-cure at 60 °C for 30–60 minutes under 405 nm UV light to reach full mechanical and ESD performance. The carbon-based filler that provides static dissipation also gives the material its matte black color. Support removal should use flush cutters - the material is brittle. Handle finished parts with ESD-safe gloves to avoid contaminating the dissipative surface.
How ESD Compares
ESD alongside related materials.
| ESD | Flame Retardant | Rigid 10K | Grey V5 | |
|---|---|---|---|---|
| Tensile strength | 42 MPa | 56 MPa | 88 MPa | 62 MPa |
| Heat deflection (HDT) | 66 °C @ 0.45 MPa | 111 °C @ 0.45 MPa | 238 °C @ 0.45 MPa | 71 °C @ 0.45 MPa |
| Flexural modulus | 1,900 MPa | 2,900 MPa | - | 2,750 MPa |
| Elongation | 5.5% | 5% | 1.7% | 13% |
| Density | 1.25 g/cm³ | 1.30 g/cm³ | 1.45 g/cm³ | 1.18 g/cm³ |
| Relative cost | $$$$ | $$$$ | $$$$ | $$ |
When to Use ESD
Where ESD fits, where it doesn't, and what to use instead.
SMT pick-and-place fixtures and nests
Controlled surface resistivity (10⁶–10⁹ Ω) dissipates static charge gradually, preventing ESD damage to ICs during SMT assembly while holding ±0.1 mm positional accuracy.
EngineeringChip trays and component carriers
SLA precision reproduces pocket dimensions and retention features that match production chip trays, enabling process validation with ESD-safe printed carriers.
EngineeringFinal-assembly and test fixtures for PCBAs
42 MPa tensile at 1,900 MPa flex modulus supports pogo-pin test loads and component insertion forces without flex, while ESD-safe surface protects populated boards.
EngineeringCleanroom-compatible inspection tooling
Non-shedding, static-dissipative surface prevents particle attraction in cleanroom environments - critical for semiconductor and medical-device inspection jigs.
Medical DevicesPrototype enclosures for ESD-sensitive electronics
Printed ESD-safe housings let designers validate form factor, connector placement, and thermal management on boards with sensitive RF and analog circuits.
Consumer ProductsStrengths
- Controlled surface resistivity (10⁶–10⁹ Ω) dissipates charge gradually - prevents both ESD events and charge accumulation that attracts contaminants
- SLA precision (±0.1 mm) on ESD-safe parts - no other ESD-safe 3D printing material in the catalog matches this feature resolution
- 42 MPa tensile and 1,900 MPa flex modulus - real structural capability for fixtures and nests that must hold positional accuracy under pogo-pin and assembly loads
Keep in mind
- 5.5% elongation - brittle under impact; handle fixtures carefully and avoid dropping; not for parts that see mechanical shock
- 66 °C HDT limits thermal applications - reflow-oven proximity or wave-solder fixtures are out of range; FDM alternatives may handle higher temperatures
- $$$$ cost tier - specify only when ESD performance is a real requirement; Grey V5 at $$ handles most non-ESD prototyping needs
Finishes & Colors
Finishing options and in-stock colors for ESD.
Standard
Washed, post-cured; matte black ESD-safe surface.
Best for: Electronics fixtures, chip trays
In-Stock Colors
Black
Custom colors and dyeing available on request. Contact us for options.
ESD FAQ
ESD resin contains a conductive filler that provides controlled surface resistivity (10⁶–10⁹ Ω). This dissipates static charge gradually rather than allowing sudden discharge. Standard SLA resins are insulative and can build up charge that damages sensitive electronics on contact.
ESD resin is static-dissipative with surface resistivity in the 10⁶–10⁹ Ω range - the range specified by ANSI/ESD S20.20 for ESD-protective materials. It prevents both sudden discharge and charge accumulation. Verify specific ESD requirements against your facility's standards at quoting.
ESD resin is widely used for prototype and low-volume chip trays and component carriers. SLA precision (±0.1 mm) reproduces pocket dimensions that match production JEDEC trays. For production volumes, injection-molded ESD-safe polymers are more cost-effective.
ESD resin provides bulk dissipation - the entire part is ESD-safe, not just the surface. Coatings can wear off, chip, or fail at edges and contact points. For fixtures that see daily handling and repeated component contact, bulk ESD material is more reliable than coatings.
ESD resin has 42 MPa tensile and 1,900 MPa flex modulus - comparable to Tough 2000 in strength. It supports the mechanical loads typical of test fixtures and assembly nests. However, at 5.5% elongation it is brittle - handle carefully and avoid dropping.
The Form 4 holds ±0.1 mm or ±0.1% on ESD resin parts. This is precise enough to reproduce JEDEC-spec chip-pocket dimensions and alignment features for SMT fixtures. Specify critical dimensions at quoting.
No. ESD resin has a 66 °C HDT - well below reflow temperatures (230–260 °C). It is designed for room-temperature electronics handling, not oven fixtures. For high-temperature ESD fixtures, discuss machined ESD-safe alternatives with us.
ESD resin is suitable for cleanroom environments. Its static-dissipative surface prevents particle attraction, and the cured resin does not shed particles. Verify specific cleanroom compatibility (ISO class) against your facility requirements.
Technical Documents
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