Technical Information – PCB Test Fixtures

Technical Information


Top Plate

-Made from fine weave ESD Impregnated AT7000TM FR4/G10 material designed specifically for the ATE Industry.

-Standard thickness 3/16 inches [4.8mm]. (Optional thickness available-please contact sales.)

-Keysight (Agilent) 3070 Series are supplied with the silk-screened gridwork.

Probe Plate

-Made from fine weave AT7000TM FR4/G10 material designed specifically for the ATE Industry.

-Larger 20″x30″ [508mm x 762mm], 24″x30″ [610mm x 762mm] & Keysight (Agilent) 3070 Series Probe Plates are manufactured from high density AT8000TM FR4/G10 material that is designed to add up to 50% more strength than conventional FR4/G10.

-Standard thickness 3/8 inches [9.5mm].

-24″x30″ [610mm x 762mm]Probe Plate thickness 1/2 inches [12.7mm].

-Keysight (Agilent) 3070 Probe Plate thickness 9/16 inches [14.1mm] and has silk-screened gridwork on both sides. (Optional 3/4 inch [19mm] thickness available.)

-Optional thickness available (contact sales).


H+W Test Products includes a Certificate of Authenticity with every test fixture kit. The certificate and fixture probe plate are labeled with a serial number specific to that fixture only. Each certificate is embossed with a raised seal and signed by an H+W employee.

“Quick Twist”® Locking Guide Pin

-Larger 5/16 inch [7.9mm] diameter shaft to provide precise alignment.

-Improved registration.

-Quick easy installation & operation.

Rebound Seal®

-Material: Open Cell Poron Urethane.

-Cross section size: 3/8″ x 5/8″ [9.5mm x 15.9mm].

Base Pan

-Manufactured from .09 inch [2.3mm] aluminum alloy 5052-H32.

-Larger 20″x30″ [508mm x 762mm] & 24″x30″ [610mm x 762mm] base pans manufactured from .12 inch [3.2mm] aluminum alloy.

-All seams have full penetration welds, grinded flush with outside surfaces for a clean, professional looking finish.

-Base pans get powder coated for durable, long lasting finish.

RoHS Compliant

H+W Test Products has updated it’s Test Fixture Kits to be RoHS compliant.

Interface Panels and Ground Planes are RoHS compliant.

What is ROHS?

The RoHS directive stands for “the restriction of the use of certain hazardous substances in electrical and electronic equipment”. The directive bans the use of equipment containing more than agreed upon levels of lead, cadmium, mercury and polybrominated diphenyl ether.

Conflict Minerals and REACH

H+W Test Products, Inc. is sensitive to the global sources of certain precious minerals and therefore we are compliant with these international regulations.

H+W Test Products, Inc. is also careful that non of our products have any of the chemicals listed on the international list of SVHC.

United States Patents

5,430,385 Test Fixture for printed circuit boards (pcb test fixtures) having a dual seal system.

6,054,869 Bi-Level Test Fixture for testing printed circuit boards (pcb test fixtures).

D416,212 Handle for Test Fixture.

FR4/G10 Technical Data

Conventional FR4/G10, Flexural Modulus, LW 55,000 kpsi, CW 45,000 kpsi.

AT7000TM FR4/G10, Flexural Modulus, LW 65,000 kpsi, CW 52,000 kpsi.

AT9000TM FR4/G10, Flexural Modulus, LW 65,000 kpsi, CW 52,000 kpsi.

AT8000TM FR4/G10, Flexural Modulus, LW 84,000 kpsi, CW 66,000 kpsi.

AT9000TM has an impregnated top surface with an (ESD) electrostatic dissipative surface with a resistivity of 105 to 1012 ohms per square inch.

AT9000TM meets the Electrostatic Discharge Association’s standard of 105 to 1012 ohms per square inch.


Static electricity is generated whenever two materials touch then separate. Friction between the two materials causes heat which, in turn, excites electrons. When objects separate, there is a transfer of electrons from one object to another. One material charges positively and the other negatively during separation. The result is static build-up. This is referred to as triboelectric generation and is the most common form of uncontrolled transfer of static charge. However, an electrically conductive path to ground will harmlessly dissipate the charge from the material. Electrical charge also dissipates into the air, a phenomena that increases with humidity. The amount and rate of charge build-up is influenced by factors such as type of materials, material cleanliness, speed of separation, material texture, friction, and relative humidity. The simple act of walking across an untreated vinyl floor generates a static charge up to 12kV, yet a charge of less than 10V can destroy an electronically sensative device.

Special static-control materials such as AT9000TM have electrical resistance properties between those of conductors 105 and insulators 1012. They dissipate static in a controlled manner.


For ESD purposes, many materials are classified by their resistance or resistivity characteristics. The following ranges and definitions are found in ESD Association or EIA standard publications, & United States Department of Defense Standard Practice, MIL Spec. Handbook MIL-HDBK-263B, Section MIL-STD-1686C.


A material that prevents or limits the flow of electrons across its surface or through its volume is called an insulator. Insulators have an extremely high electrical resistance, generally greater than 1 x 1012 ohms/sq (surface resistivity) and 1 x 1011 ohm-cm (volume resistivity). A considerable amount of charge can be generated on the surface of an insulator. Because an insulative materail does not readily allow the flow of electrons, both positive and negative charges can reside on insulative surface at the same time, although at different locations. The excess electrons at the negatively charged spot might be sufficient to satisfy the absence of electrons at the positively charged spot. However, electrons cannot easily flow across the insulative materials surface, and both charges may remain in place for a very long time.


A conductive material, because it has low electrical resistance, allows electrons to flow easily across its surface or through its volume. Conductive materials have low electrical resistance, generally less than 1 x 105 ohms/sq (surface resistivity) and 1 x 104 ohm-cm (volume resistivity). When a conductive material becomes charged, the charge (i.e., the deficiency or excess of electrons) will be uniformly distributed across the surface of the material. If the charged conductive material makes contact with another conductive material, the electrons will transfer between the materials quite easily. If the second conductor is attached to an earth grounding point, the electrons will flow to ground and the excess charge on the conductor will be “neutralized.” Electrostatic charge can be created triboelectrically on conductors the same way it is created on insulators. As long as the conductor is isolated from other conductors or ground, the static charge will remain on the conductor. If the conductor is grounded the charge will easily go to ground. Or, if the charged conductor contacts or nears another conductor, the charge will flow between the two conductors.


Static dissipative materials have an electrical resistance between insulative and conductive materials 1 x 105 – 1 x 1012 ohms/sq (surface resistivity) and 1 x 104 – 1 x 1011 ohm-cm (volume resistivity). There can be electron flow across or through the dissipative material, but it is controlled by the surface resistance or volume resistance of the material. As with the other two types of materials, charge can be generated triboelectrically on a static dissipative material. However, like the conductive material, the static dissipative material will allow the transfer of charge to ground or other conductive objects. The transfer of charge from a static dissipative material will generally take longer than from a conductive material of equivalent size. Charge transfers from static dissipative materials are significantly faster than from insulators, and slower than from conductors.

Specifications subject to change without notice. Consult H+W Test Products for latest design changes.


The Defense Logistics Information Service (DLIS)
Service of the Commercial and Government Entity (CAGE)
Code system assigns approval codes for manufactures worldwide. DLIS is the only source for the assignment/maintenance of CAGE Codes. In January 2009 DLIS awarded H+W Test Products with CAGE CODE 59T52.