Integrated Heat Spreader: Thickness Tolerance ± 0.05 mm

Component Specifications

Definition

An Integrated Heat Spreader is a critical thermal interface component in semiconductor packaging that serves as a protective cover and heat dissipation mechanism for integrated circuits. It consists of a precisely manufactured metal plate (typically copper or nickel-plated copper) that is bonded directly to the chip die surface using thermal interface material (TIM). The IHS provides mechanical protection, improves heat distribution across the chip surface, and creates a standardized interface for attaching external cooling solutions like heat sinks or liquid cooling blocks. Its flat surface ensures consistent thermal contact with cooling systems while protecting delicate silicon structures from physical damage and environmental contaminants.

Working Principle

The IHS operates on conductive heat transfer principles. Heat generated by the chipset's transistors flows through the die and into the IHS via the thermal interface material. The metal IHS spreads the concentrated heat across its larger surface area through thermal conductivity, reducing hot spots. This creates a more uniform temperature distribution that allows external cooling systems to remove heat more efficiently. The IHS also provides structural rigidity and protects the silicon die from mechanical stress during handling and heatsink installation.

Materials

Primary: Oxygen-free copper (C10100/C10200) or copper alloys with nickel electroplating (2-10μm thickness). Alternative: Aluminum alloys (6061/6063) for cost-sensitive applications. Thermal Interface Material: Solder (indium-based, tin-silver-copper) or polymer-based thermal compounds (silicone, epoxy) with high thermal conductivity fillers (silver, aluminum oxide, boron nitride).

Technical Parameters

Parameter	Typical range	Notes & selection driver
Surface Flatness	≤ 25 μm across surface
Plating Thickness	Nickel: 5-10 μm, optional gold flash: 0.05-0.2 μm
Surface Roughness	Ra 0.4-1.6 μm
Thermal Resistance	0.1-0.3 K/W (including TIM)
Thickness Tolerance	± 0.05 mm
Thermal Conductivity	385-400 W/m·K (copper), 200-220 W/m·K (aluminum)
Operating Temperature	-40°C to +125°C

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

Standards

ISO 9001, ISO 14001, IPC-7095, JEDEC JESD51, MIL-STD-883

Parent Products

This component is used in the following industrial products

Chipset

A set of electronic components in an integrated circuit that manages data flow between the processor, memory, and peripherals on a motherboard.

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Engineering Analysis

Risks & Mitigation

Thermal interface material degradation over time
Mechanical damage from improper heatsink installation
Warping due to thermal cycling stress
Corrosion of copper surfaces without proper plating
Void formation in solder TIM during manufacturing

FMEA Triads

Trigger: Poor thermal interface material application or degradation
Failure: Increased thermal resistance leading to chip overheating and throttling
Mitigation: Implement automated TIM dispensing with vision inspection, use high-reliability solder materials, conduct thermal cycling qualification tests

Trigger: Mechanical stress from heatsink mounting pressure
Failure: Cracked silicon die or package substrate
Mitigation: Design IHS with optimal thickness and stiffness, implement torque-controlled installation processes, use integrated load plates

Trigger: Corrosion of copper surfaces in humid environments
Failure: Reduced thermal performance and potential electrical shorts
Mitigation: Apply consistent nickel plating with optional gold flash, conduct salt spray testing per ASTM B117

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Surface flatness: ≤ 0.025mm, Thickness: ±0.05mm, Plating uniformity: ±10%

Test Method

Thermal performance: JEDEC JESD51-2A, Mechanical: IPC-TM-650, Plating: ASTM B568, Flatness: Laser interferometry per ISO 10110

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Integrated Heat Spreader

Manufacturer profiles associated with Integrated Heat Spreader.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the primary function of an Integrated Heat Spreader?

The IHS serves two main functions: 1) Mechanical protection of the delicate silicon die from physical damage and environmental contaminants, and 2) Efficient heat spreading from the concentrated heat sources on the chip to a larger surface area for more effective heat removal by external cooling systems.

Why is copper typically used for IHS manufacturing?

Copper is preferred due to its excellent thermal conductivity (approximately 400 W/m·K), which is nearly twice that of aluminum. This allows for more efficient heat spreading. Copper also has better mechanical properties for bonding processes and maintains structural integrity under thermal cycling conditions.

Can an IHS be replaced or upgraded separately?

Typically no - the IHS is permanently bonded to the chip die during manufacturing using specialized thermal interface materials and processes. Attempting to remove or replace it usually voids warranties and risks damaging the chip. Some enthusiasts practice 'delidding' for specialized cooling, but this carries significant risk.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Integrated Heat Spreader