Signal Transmission Board for Probe Card Interface

Product Specifications

Technical details and manufacturing context for Signal Transmission Board

Definition

The Signal Transmission Board is a critical component of the Probe Card Interface system used in semiconductor wafer testing. It serves as the electrical pathway that carries test signals from the automated test equipment (ATE) through the probe card to the individual die on the semiconductor wafer, and returns response signals back to the test equipment. This board ensures signal integrity, impedance matching, and minimal signal loss during high-frequency testing operations. The board operates by providing controlled impedance transmission lines that maintain signal integrity as electrical test signals pass through. It typically includes multiple layers with carefully designed trace geometries, ground planes, and shielding to minimize crosstalk, signal attenuation, and electromagnetic interference. The board interfaces with both the test equipment connectors and the probe card's contact elements. Typical specifications include 4 to 12 signal layers, board thickness from 1.6 to 3.2 mm, minimum trace width/space of 50 to 75 µm, characteristic impedance of 50 Ω ±10%, insertion loss ≤0.5 dB/cm, crosstalk ≤-30 dB, maximum operating frequency of 1 to 10 GHz, operating temperature range of -40 to 85 °C, relative humidity of 10 to 90% RH, base material FR-4 or PTFE, surface finish ENIG or ENEPIG, board size 100 to 300 mm, and weight 0.5 to 2.0 kg. These values are reference ranges and must be verified for the specific model and application. The board is manufactured using FR-4 laminate, copper foil, solder mask, and surface finish (ENIG or HASL). It complies with industry standards such as IPC-6012, IPC-2221, IPC-2141, IEC 60068-2-14, IEC 60068-2-78, IPC-4101, and IPC-4552, which serve as procurement and verification references. Always confirm model-specific values and standards with the legal manufacturer or supplier.

Working Principle

The board operates by providing controlled impedance transmission lines that maintain signal integrity as electrical test signals pass through. It typically includes multiple layers with carefully designed trace geometries, ground planes, and shielding to minimize crosstalk, signal attenuation, and electromagnetic interference. The board interfaces with both the test equipment connectors and the probe card's contact elements.

Common Materials

FR-4 laminate, Copper foil, Solder mask, Surface finish (ENIG or HASL)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Number of Signal Layers	4–12 layers	More layers allow higher routing density and better signal integrity.
Board Thickness	1.6–3.2 mm	Thicker boards provide mechanical stability for large probe cards.IPC-6012
Minimum Trace Width/Space	50–75 µm	Finer geometries enable higher pin counts but increase manufacturing cost.IPC-2221
Characteristic Impedance	50 ±10% Ω	Controlled impedance is critical for high-speed signal transmission.IPC-2141
Insertion Loss	≤0.5 dB/cm	Lower loss preserves signal integrity at high frequencies.
Crosstalk	≤-30 dB	Excessive crosstalk can cause false signals in adjacent channels.
Maximum Operating Frequency	1–10 GHz	Higher frequency requires advanced materials and design.
Operating Temperature Range	-40–85 °C	Outside this range, material expansion may affect signal integrity.IEC 60068-2-14
Relative Humidity	10–90 % RH	High humidity can cause corrosion and leakage currents.IEC 60068-2-78
Base Material	FR-4 / PTFE	PTFE offers lower dielectric loss for high-frequency applications.IPC-4101
Surface Finish	ENIG / ENEPIG	ENIG provides good solderability and wire bonding capability.IPC-4552
Board Size	100–300 mm	Larger boards accommodate more probe pins but require stiffer construction.
Weight	0.5–2.0 kg	Heavier boards may need additional support in the test system.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Circuit Board
The board itself: the substrate and copper traces that carry power and signals between the parts on it.
Transmission Lines
Carry electrical signals with controlled impedance

Material: Copper traces
Ground Planes Part
Provide reference potential and reduce electromagnetic interference

Material: Copper layers
Connector Pads Part
Interface points for connecting to test equipment and probe card

Material: Copper with surface finish
Via Structures Part
Provide electrical connections between different PCB layers

Material: Plated copper

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Signal Transmission Board.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Probe Card Interface

View system integration details

Manufacturers of Signal Transmission Board

Manufacturer profiles associated with Signal Transmission Board.

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Frequently Asked Questions

What is the primary function of the Signal Transmission Board?

It transmits electrical test signals between the automated test equipment and the semiconductor wafer through the probe card, ensuring signal integrity and minimal loss.

What materials are typically used in its construction?

Common materials include FR-4 laminate, copper foil, solder mask, and surface finishes such as ENIG or HASL. For high-frequency applications, PTFE may be used as base material.

What are the typical electrical specifications?

Reference ranges include characteristic impedance of 50 Ω ±10%, insertion loss ≤0.5 dB/cm, crosstalk ≤-30 dB, and maximum operating frequency of 1 to 10 GHz. These must be verified for the specific model.

Which standards apply to this board?

Relevant standards include IPC-6012 for board thickness, IPC-2221 for trace width, IPC-2141 for impedance, IEC 60068-2-14 for temperature, IEC 60068-2-78 for humidity, IPC-4101 for base material, and IPC-4552 for surface finish. Always confirm compliance with the manufacturer.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Atmospheric (non-pressurized environment)
other spec:	Signal frequency range: DC to 10 GHz, Contact force: 1-10g per pin
temperature:	-40°C to +125°C

Signal Transmission Board

Product Specifications

Industry Taxonomies & Aliases

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards