Choosing Conductive and Antistatic Materials for Semiconductor Packaging: Four Practical Approaches

Semiconductor devices pass through multiple stages of handling, inspection, packaging and transportation before reaching their final destination. Throughout this process, the materials used in trays, carrier tapes and protective covers play an important role in controlling electrostatic discharge (ESD) risks.

Selecting these materials involves more than meeting a target resistance range. Mechanical durability, dimensional stability, processing consistency and, in some applications, optical clarity must also be considered. A material that performs well in laboratory testing may behave differently once it has been molded into a complex part or thermoformed into a carrier tape.

The requirements vary considerably from one packaging component to another. Drawing on its experience in conductive and antistatic polymer compounding, DEYU Plastics has developed four material grades for different semiconductor handling and packaging applications: permanent antistatic ABS, extrusion-grade conductive PC, transparent antistatic ABS and highly conductive PP.

Reusable Injection-Molded Trays: Balancing Durability and Static Control

Semiconductor handling trays are routinely subjected to stacking, repeated handling and cleaning procedures. Beyond providing ESD protection, the material must maintain its shape and mechanical integrity throughout these operations.

The design of positioning pockets, reinforcing ribs, snap-fit features and thin-wall sections can influence not only the tray’s mechanical performance but also the distribution of electrical resistance across the finished part.

DEYU Plastics’ DGK-ABS KJD678R-BZ is a permanent antistatic ABS grade with a surface resistance range of 10⁷–10⁹ Ω. Designed for electronic component trays, transfer trays and ESD-sensitive structural components, it offers a flexural strength of 52 MPa and an Izod notched impact strength of 24 kJ/m².

The polymer-alloy formulation is designed to provide long-lasting antistatic performance while balancing mechanical durability, appearance and processability. Maintaining electrical performance through repeated handling and specified cleaning cycles is also an important consideration in its development.

For reusable trays, material evaluation should extend beyond initial resistance measurements. Mold trials should examine thin-wall sections, reinforcing ribs, weld lines and flow-end regions, where processing conditions may affect the finished part.

Dimensional accuracy, stacking compatibility and electrical performance after repeated handling and cleaning should also be evaluated using the intended tray design.

Extruded Carrier Tape and Thermoformed Packaging: Surface Quality and Electrical Consistency

Carrier tapes are widely used to organize and transport semiconductor components through automated assembly and packaging processes. One common manufacturing method involves extruding a plastic sheet and then thermoforming it into pockets designed to hold individual components.

This process places several demands on the material. The sheet must have suitable thickness uniformity, consistent electrical properties, a controlled surface finish and sufficient formability to produce accurately shaped pockets.

Resistance measured along the machine direction (MD) may differ from that measured across the sheet in the transverse direction (TD). A substantial difference can complicate downstream validation, particularly when electrical performance must remain consistent after thermoforming.

Surface defects such as pitting, filler agglomeration and uneven texture can also affect the quality of the finished carrier tape.

To address these requirements, DEYU Plastics offers DGK-PC DD5-7JC, an extrusion-grade conductive PC compound with a surface resistance range of 10⁵–10⁷ Ω and a heat deflection temperature of 124°C at 0.45 MPa.

The material is intended for conductive sheets, semiconductor carrier tapes, electronic trays and other thermoformed ESD packaging components. Matte and glossy surface finishes are available according to project requirements.

Validation should cover both sheet extrusion and subsequent pocket forming. Initial testing should focus on sheet thickness, surface quality and electrical resistance in the machine and transverse directions.

After thermoforming, engineers should check pocket dimensions, surface condition and electrical resistance at critical locations, rather than relying solely on measurements from the extruded sheet.

Transparent Covers and Viewing Windows: Combining Optical Clarity with Static Control

Not every semiconductor packaging component needs to be opaque.

In some applications, operators and automated vision systems must identify component orientation, position or markings through a protective cover. This introduces an additional challenge: maintaining optical clarity without compromising the material’s static-control function.

Unlike conventional black conductive compounds, transparent antistatic materials must balance electrical performance with light transmission, haze, surface appearance and mechanical properties.

DGK-ABS KJD890TM is DEYU Plastics’ transparent permanent antistatic ABS compound, with a surface resistance range of 10⁸–10¹⁰ Ω and light transmittance exceeding 85%.

The material is designed for transparent ESD covers, viewing windows, protective equipment components and other applications requiring both visibility and static control.

Its formulation combines a transparent ABS resin system with polymeric antistatic technology, providing an alternative to opaque conductive materials where visual inspection is required.

Optical performance should be evaluated using the actual part geometry and target wall thickness. A nominal transmittance value does not necessarily reflect the appearance of a finished injection-molded component.

Haze, surface quality, optical distortion and electrical performance should therefore be assessed on molded samples.

Where the application also requires electrostatic discharge shielding, that capability must be evaluated at the complete packaging-system level rather than inferred from the material’s antistatic properties alone.

Highly Conductive PP: Low-Resistance Components and Structural Applications

Some components used in semiconductor handling and transport systems require substantially lower electrical resistance than conventional static-dissipative packaging.

Examples include conductive clips, electrical connection components and molded structural parts designed to provide low-resistance pathways.

These applications call for a different material approach, with particular attention to electrical conductivity, contact geometry, mechanical performance and molding consistency.

DEYU Plastics’ DGK-PP DD2-3A is a highly conductive polypropylene compound with a surface resistance range of 10²–10³ Ω.

The formulation uses a carbon nanotube (CNT) compounding system with a CNT loading of approximately 5–10 wt%, designed to establish an effective conductive network while retaining injection-molding processability.

Potential applications include conductive clips, low-resistance structural components, ESD trays and specialized parts used in electronic handling systems.

For larger or geometrically complex molded components, achieving the required electrical performance involves more than selecting the appropriate compound.

Filler dispersion, melt flow, cooling conditions and the formation of conductive networks during molding can affect resistance across the finished part.

Electrical measurements should therefore cover the main body, weld lines, flow-end regions and intended contact points. Mechanical fit and dimensional stability should be evaluated alongside electrical resistance.

Whether a highly conductive grade is suitable depends on the component’s electrical function within the overall packaging and handling system.

Project Case: Improving Conductive PC Sheet Quality and Carrier Tape Forming Yield

A DEYU Plastics carrier tape project illustrates how material formulation and processing conditions can affect both sheet quality and downstream forming performance.

The customer’s previous conductive PC material had problems with surface quality and electrical consistency.

The extruded sheet exhibited approximately 5–8 surface defects per square meter, while carrier tape forming yield remained at around 85%.

Electrical testing also revealed a substantial difference between the machine and transverse directions. Surface resistance measured approximately 3 × 10⁶ Ω in the machine direction but reached 2 × 10⁸ Ω in the transverse direction.

To improve both sheet quality and electrical consistency, the project adopted the extrusion-optimized DGK-PC DD5-7JC compound, targeting a surface resistance range of 10⁵–10⁷ Ω.

The material change was accompanied by adjustments to drying and extrusion conditions. Drying was set at 110°C for 4.5 hours, while the extruder die temperature was reduced from 265°C to 260°C.

Project Results

Following the material and processing adjustments, carrier tape forming yield increased from 85% to 96.5%, an improvement of 11.5 percentage points.

The difference in electrical resistance between the machine and transverse directions was reduced from approximately two orders of magnitude to less than half an order of magnitude, indicating substantially improved directional consistency.

Surface defects were reduced to fewer than one per square meter, while continuous production time increased to more than 12 hours.

These improvements were achieved through a combination of material substitution and changes to drying and extrusion conditions, rather than a change in the compound alone.

For similar applications, testing under actual production conditions allows engineers to assess electrical consistency, sheet surface quality and forming performance before moving to larger-scale production.

Comparing Four Material Options for Semiconductor Packaging

Although these four compounds address electrical performance requirements, they are intended for different processing methods and packaging functions.

These resistance ranges provide a starting point for material selection, but meaningful comparisons require consistent testing conditions.

Measurement methods, sample conditioning, electrode arrangements and the distinction between surface resistance and volume resistivity should all be considered when reviewing material specifications.

From Material Selection to Production Validation

Selecting conductive or antistatic materials for semiconductor packaging begins with understanding what each component is expected to do.

Reusable trays require a combination of mechanical durability and static control. Extruded carrier tapes place greater emphasis on surface quality, electrical consistency and forming performance. Transparent covers introduce optical requirements, while highly conductive structural components must provide suitable low-resistance pathways without compromising dimensional or mechanical performance.

These requirements cannot always be met by a single conductive or antistatic compound.

DEYU Plastics develops conductive and antistatic compounds based on multiple polymer systems for injection molding, extrusion, thermoforming and other industrial processing methods.

Its approach connects material formulation with the intended manufacturing process, allowing electrical performance, mechanical properties and production requirements to be considered together.

DEYU Plastics also provides material selection support, small-batch customization, trial production and processing assistance. For projects with defined requirements and available formulations and raw materials, sample preparation can typically be arranged within 3–5 days, subject to project confirmation.

With component drawings, target wall thickness, processing methods, electrical specifications and expected handling conditions, DEYU’s engineering team can identify a suitable starting grade and determine what needs to be checked during the first production trial.