This Adhesive Back Heatsink is a CNC-machined aluminum or copper heat sink with a pre-applied thermally conductive adhesive tape on the mounting face. You peel, press, and your power component is ther
This Adhesive Back Heatsink is a CNC-machined aluminum or copper heat sink with a pre-applied thermally conductive adhesive tape on the mounting face. You peel, press, and your power component is thermally bonded with zero screws, zero drilling, and zero thermal grease. Our factory holds a flatness tolerance of 0.02 mm on the contact surface, a surface finish of Ra 0.8 µm, and a maximum runout of 0.03 mm on the fin array—so your thermal interface stays thin and uniform. Lead time is 5 working days for standard sizes; prototypes ship in 48 hours from our Dongguan plant.
We bond a 0.25 mm thick thermally conductive acrylic or silicone tape (3M 8810 or equivalent) onto a precisely lapped base plate. The tape’s thermal conductivity is 0.8 W/mK—not as high as solder, but it eliminates the air gaps that grease often leaves. Our tape has a peel strength of 1.2 N/mm, so it holds a 100 g heat sink vertically on a PCB without sagging. For higher heat loads above 15 W, we recommend adding a mechanical clip; for everything below, the adhesive alone is sufficient.
Adhesive works only if the metal underneath is truly flat. Warped bases create air pockets, and air is a thermal insulator. That is why we CNC fly-cut every base plate and then hand-lap it on a granite surface plate. We check flatness with a dial indicator on a 0.001 mm resolution stand. If the base exceeds 0.02 mm flatness across its diagonal, we reject it. This is the difference between a heat sink that cools and one that just looks like it should.
Standard fins are 1.5 mm thick with a 4 mm pitch, giving you 35% open area for natural convection. For forced airflow, we can machine fins as thin as 0.8 mm with a 2.5 mm pitch—but we will warn you: thinner fins bend more easily, so we cap fin height at 25 mm for 0.8 mm thickness. Every fin is cut with a 0.01 mm runout relative to the base, ensuring the entire fin surface participates in heat transfer. We do not stamp fins; stamped fins have burrs that reduce airflow. We cut them with CNC end mills.
Your default material is 6063-T5 aluminum alloy—thermal conductivity 201 W/mK, yield strength 130 MPa. For higher heat density, we offer C1100 copper (385 W/mK) but copper doubles the weight and triples the cost. We also stock 6061-T6 for applications requiring a harder surface (95 HB) where the heat sink doubles as a structural bracket. All aluminum is T5 or T6 temper—never annealed. We do not anodize the contact surface; anodizing adds a 25 µm oxide layer that blocks heat transfer. If you need a black finish, we mask the base, anodize only the fins, and then apply the adhesive tape afterward.
Acrylic tape (our default) works from -40 °C to +150 °C and is cheaper. Silicone tape works from -60 °C to +230 °C and is better for high-vibration environments because it absorbs more shear stress. But silicone outgasses in vacuum applications—do not use it in sealed enclosures without venting. Tell us your maximum continuous junction temperature, and we will select the tape. We stock both in widths from 10 mm to 80 mm, and we die-cut the tape to match your footprint exactly—no overhang, no exposed edges that peel up during reflow.
Every batch gets a 90-degree peel test on a tensile machine, verifying 1.2 N/mm minimum adhesion. We also measure base flatness, fin runout, and overall height with a CMM (coordinate measuring machine) and include a digital report with each shipment. The report lists all critical dimensions and a photo of the tape edge under 10x magnification. If you have a drawing with GD&T, we check against that. If you have no drawing, we use our own internal standard—which is stricter than most industry norms. We keep a sample of every batch for 12 months in case of field failure.
The adhesive face is covered with a silicone-coated release liner that we remove only after you are ready to mount. During shipping, we place each heat sink in its own ESD-safe plastic tray, then pack trays in corrugated boxes with 20 mm foam on all sides. We have seen cheap heat sinks arrive with dust embedded in the tape—that kills thermal performance. Ours arrive with the tape protected, and we include a lint-free wipe for the component surface before application. No plastic dust, no paper fibers, no fingerprints.
| Specification | Value | Notes |
|---|---|---|
| Base Material | 6063-T5 / 6061-T6 / C1100 Copper | Aluminum default, copper on request |
| Base Flatness | ≤ 0.02 mm | Measured per 100 mm diagonal |
| Surface Finish (Base) | Ra 0.8 µm | Fly-cut + lapped |
| Fin Runout | ≤ 0.03 mm | Relative to base plane |
| Fin Thickness | 0.8 – 3.0 mm | CNC milled, no stamping burrs |
| Fin Pitch | 2.5 – 6.0 mm | Custom per airflow requirement |
| Overall Height | 5 – 60 mm | Including base and adhesive |
| Adhesive Tape | 3M 8810 / Silicone 9088 | 0.25 mm thick, 0.8 W/mK |
| Tape Peel Strength | 1.2 N/mm | 90-degree pull test, per batch |
| Temperature Range | -40 °C to +150 °C (acrylic) | Silicone up to +230 °C |
| Lead Time | 5 working days (standard) | 48-hour prototype rush |
| MOQ | No MOQ | 1 piece for testing accepted |
No MOQ. We ship one prototype or a thousand units at the same unit price for the first 100 pieces; volume discounts start at 500 pieces.
Yes, we machine any custom footprint from your 2D drawing or 3D STEP file, and we can add a second adhesive pad for multi-component mounting.
We run a 90-degree peel test on a sample from every batch, and we accept only if the peel force exceeds 1.2 N/mm at 300 mm/min pull speed.
For a standard aluminum size with no special tape, we can ship in 48 hours from drawing approval; for copper or complex fin geometry, expect 5 working days.
Send your drawing with dimensions, heat load in watts, and your ambient temperature—we will confirm the correct fin area and adhesive tape within 12 hours. For a firm quote, email sc@bquq.com or WhatsApp +86 13713157787. We are a precision manufacturing factory in Dongguan, China, with 20 years of CNC machining, stamping, and spring experience. If you are comparing tooling options, read our CNC cutting tool selection guide to see why we use specific end mills for fin cutting. And if you are unsure about our 0.02 mm flatness claim, our CNC machining tolerances guide explains exactly how we hold those numbers on every part. No runaround, no hidden costs—just a heat sink that mounts in seconds and cools for years.
| Parameter | Capability |
|---|---|
| Materials | AL6063/6061/5052, pure copper C1100, copper-aluminum composite |
| Process | Extrusion, CNC machining, skiving, forging, die casting, stamping fins |
| Fin Types | Extruded, pin fin, skived, folded, bonded, heat pipe, vapor chamber |
| Surface | Black anodizing, clear anodizing, nickel plating, powder coating |
| Size Range | Max 1500 x 400 x 300 mm |
| Thermal Test | Thermal resistance and heat dissipation data per batch |
| Prototype | 5-7 days, no MOQ on samples |
| Inspection | CMM, thermal resistance tester, full report per batch |
