PTM 7000 | Phase Change Pad

Harmonization Code : 8473.30.80.00 |   Parts and accessories (other than covers, carrying cases and the like) suitable for use solely or principally with machines of headings 8470 to 8472 ; Parts and accessories of the machines of heading 8471 ; Other; Other
Main features
  • 0.06 Thermal Impedance
  • 6.5 Thermal Conductivity
  • Pad form

Product Description

PTM7000 is designed to minimize thermal resistance at interfaces and maintain extremely stable performance through reliability testing required for long product life applications. As with all Phase change materials, it has stable Thermal Impedance across accelerated aging tests and does not display bleed, pump or flow out. PTM7XXX product line has the highest Thermal conductivity and lowest thermal impedance out of the entire PTM Series.

PTM7000 has a Thermal conductivity of 6.5 (W/m·K) depending on the bondline thickness and is based on a robust polymer PCM structure that exhibits excellent wetting properties during typical operating temperature ranges, resulting in very low surface contact resistance. Typical temperature range is -40°C to 125°C. This proprietary material provides superior reliability and maintains low thermal impedance (0.06) , making it desirable for high-performance integrated circuit devices. Regarding breakdown voltage, phase change materials are typically aroun 5000V/mm but this is highly thickness depend. Naturally an initial "unphased" 0.2mm pad will have different BV than the final 30/40um bondline.

Please keep in mind that 7XXX is a Product Series. Base 7000 performs on the baseline of the stated properties while PTM7900 and PTM7950 are the highest performing materials of this product line reaching 8.5 W/m·K and 0.04 TI.

Product Family
22 x 8 x 0.2mm Pad 27 x 44 x 0.2mm Pad 33 x 38 x 0.2mm Pad 150 x 400 x 0.2mm Sheet 150 x 400 x 0.25mm Sheet 45 x 35 x 0.25mm Pad

Catalog Product

Unlike other products we offer, the products listed on this page cannot currently be ordered directly from the website.

Technical Specifications

General Properties
Specific Gravity
Specific Gravity
Specific gravity (SG) is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume.

For liquids, the reference substance is almost always water (1), while for gases, it is air (1.18) at room temperature. Specific gravity is unitless.
Thickness range 0.20 - 1.00 mm
Electrical Properties
Volume Resistivity
Volume Resistivity
Volume resistivity, also called volume resistance, bulk resistance or bulk resistivity is a thickness dependent measurement of the resistivity of a material perpendicular to the plane of the surface.
2.1x1014 Ohms⋅cm
Thermal Properties
Thermal Conductivity
Thermal Conductivity
Thermal conductivity describes the ability of a material to conduct heat. It is required by power packages in order to dissipate heat and maintain stable electrical performance.

Thermal conductivity units are [W/(m K)] in the SI system and [Btu/(hr ft °F)] in the Imperial system.
6.5 W/m.K
Thermal Impedance 0.06 °C·cm²/W

Additional Information

What are the reliability expectations of the PTM 7XXX products?

All the 7XXXseries (7000, 7900 & 7950) pass the three major reliability tests with flying colours. Honeywell does not test beyond 1000 cycles, 92 hrs HAST and 1000 hrs HTS. However, anecdotally, some automotive customers have taken 7900 to beyond Honeywell’s limits and have found it to pass shock and vibration, longer temperature cycling and longer temperature and humidity soak.
If your lifetime performance is defined mainly by power cycling, then you also check the 6000 series which will have the longest life.
The main difference between the 7XXX products is the filler content which makes 7950 the most conductive.

PTM7XXX Series - Pressure vs Thermal Impedance

PTM7XXX Series vs Competition comparison