--- title: Thermal slide debonding for temporary bonding processes (Part 3 of 3) description: Thermal slide debonding represents the next significant advancement in obtaining high-yield thin wafer results. 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[trilayer (1)](https://blog.brewerscience.com/topic/trilayer) - [trilayer resist process (1)](https://blog.brewerscience.com/topic/trilayer-resist-process) - [ultrathin wafers (1)](https://blog.brewerscience.com/topic/ultrathin-wafers) - [unilayer processing (1)](https://blog.brewerscience.com/topic/unilayer-processing) - [unplugged (1)](https://blog.brewerscience.com/topic/unplugged) - [wafer problems (1)](https://blog.brewerscience.com/topic/wafer-problems) - [water (1)](https://blog.brewerscience.com/topic/water) - [wearable devices (1)](https://blog.brewerscience.com/topic/wearable-devices) - [wearable solar (1)](https://blog.brewerscience.com/topic/wearable-solar) - [wireless headphones (1)](https://blog.brewerscience.com/topic/wireless-headphones) - [workplace safety (1)](https://blog.brewerscience.com/topic/workplace-safety) - [zero landfill (1)](https://blog.brewerscience.com/topic/zero-landfill) # Thermal slide debonding for temporary bonding processes (Part 3 of 3) [Nick Skelton](https://blog.brewerscience.com/author/nick-skelton) Apr 09, 2013 ### Subscribe to Our Blog Thermal slide debonding represents the next significant advancement in obtaining high-yield thin wafer results. Initial detection of anomalies and cracks usually occurs during debonding; however, many causes for this damage originate during upstream bonding material coating, curing, bonding, and thinning processes. Moreover, only thermal separation tools that are highly precise and highly accurate will consistently render desirable process yields. The bonded pair is subjected to many thermal and compressive forces during processing and debonding. The thinned device layers are often very sensitive to outside factors including temperature, vacuum, and mechanical compression and release. For debonding, relatively speaking, silicon materials are inherently more flexible than III-V compounds and allow greater control tolerances. Consequently compound semiconductor (CS) materials require significantly tighter control of platen temperature uniformity, pull force, vacuum fluctuations, platen separation, and platen co-planarity. The Cee® 1300CSX thermal slide debonder (see image below) has been specifically designed to meet and exceed these specifications.  ![1300 CSX debonder](https://blog.brewerscience.com/hs-fs/file-28275336-png/images/1300csx1.png)   In this tool, wafer stacks are processed with the thinned device wafer orientated to contact the upper chuck and the carrier substrate is held in place by a vacuum emanating from the lower chuck. A manual insertion tool accurately aligns the bonded pair onto the lower platen lift pins. The lift pins are programmed electronically and provide precisely controlled acceleration for bringing the substrate to the desired set point temperature for heating the thermoplastic bonding material to the appropriate temperature to achieve a viscosity of <300 Pa·s. The following steps outline the standard process flow for thermal separation (see diagram below). ![thermal slide](https://blog.brewerscience.com/hs-fs/file-28296802-png/images/thermal-slide.png)   Operating the debonder involves the following processing steps: 1. Load the debonding recipe (platen temperatures, pull force, thermal dwell times, electronic lift pin (ELP) positions, platen positional search windows, vacuum sensing threshold, etc.). 2. Confirm the stack configuration (diameter and height/thickness). Recipes must match these physical characteristics. 3. Using insertion tool, load the wafer onto the lift pins. 4. Initiate the debonder recipe. 5. The first recipe step is adjusting the lift pin positional height to allow a gradual increase in temperature for thermally sensitive materials. 6. After achieving the appropriate thermal stabilization, the pre-bake step concludes, and the lower platen moves from the load to the press position. 7. Upon reaching the press position, the platen is raised to the appropriate height to a predetermined vacuum search position. 8. Once the minimum vacuum threshold is achieved, the system will enter the thermal stabilization step to ensure minimal temperature gradients. 9. After the minimum temperature gradient is reached, the lower platen will pull in the x direction within preprogrammed force and speed limitations. During this pull, the following variables are monitored, controlled, and logged: z position, x position, force, speeds, upper and lower vacuum, upper and lower temperature, and process sampling time. The consistent profile of these variables is evidence of appropriate debonding parameters and may be used as a statistical process control. 10. Upon debonding completion, the lower platen will drop and move to the load/unload position. 11. The vacuum will shut off, and the lift pins will rise to the unload position for removal of the carrier. 12. A specialized Gel-Pak® end effector is then inserted into tool under the upper platen and raised to a minimal distance (<2 mm) from the device wafer. Vacuum is released on the upper platen, and the wafer is gently transferred to the top surface of the Gel-Pak® end effector.    ![thinned device](https://blog.brewerscience.com/hs-fs/file-28296853-png/images/thinned-device.png) Transferring the intact device to a post-debonding spin-cleaning tool is the next critical step. The most common transfer method is outlined below:   1. The device wafer and Gel-Pak® end effector are removed using the extraction tool assembly, and the entire Gel-Pak®/thinned device wafer structure is flipped onto a full sized porous ceramic spin chuck. Vacuum is applied through the spin chuck, and the device is released from the Gel-Pak® layer for cleaning. 2. The remaining bonding material is removed from the device in a spin-cleaning process similar to a stream-puddle develop process. Megasonic cleaning is also a popular, safe method for cleaning residual bonding material to decrease cycle times and reduce solvent consumption (see photo below). 3. After being cleaned, the device is lifted from the spin chuck with another clean Gel-Pak® carrier and mounted to a film frame on dicing tape.  ![gel pak](https://blog.brewerscience.com/hs-fs/file-28297096-png/images/gel-pak.png) ![megasonic cleaning](https://blog.brewerscience.com/hs-fs/file-28297438-png/images/megasonic-cleaning.png) ![device wafer](https://blog.brewerscience.com/hs-fs/file-28297660-png/images/device-wafer.png)   Brewer Science is uniquely positioned to seamlessly integrate the materials, processes, and machines for adopting a precision temporary thermal bonding/debonding application. Our product portfolio includes high-temperature temporary bonding materials (WaferBOND® HT-10.10 material), precision spin coaters (Cee® 200X and 300X tools), bake plates (Cee®1300X and 200CBX tools), temporary bonders, debonders (Cee®1300DB and 1300CSX tools), thin-wafer transfer tooling, and cleaning tools (Cee®200XD, 300XD, and 300MXD tools). Please contact us today to learn more about these advanced technologies and products for overcoming daunting process challenges. We are standing by to assist you. Gel-Pak® is a registered trademark of Gel-Pak LLC. [spincoat](https://blog.brewerscience.com/topic/spincoat), [thin wafer handling](https://blog.brewerscience.com/topic/thin-wafer-handling), [3D packaging](https://blog.brewerscience.com/topic/3d-packaging), [debonder](https://blog.brewerscience.com/topic/debonder), [wafer-level packaging](https://blog.brewerscience.com/topic/wafer-level-packaging) [Thermal slide debonding for temporary bonding processes (Part 2 of 3)](https://blog.brewerscience.com/blog/bid/95688/thermal-slide-debonding-for-temporary-bonding-processes-part-2-of-3) [Process methodologies for temporary thin wafer handling solutions](https://blog.brewerscience.com/blog/bid/96431/process-methodologies-for-temporary-thin-wafer-handling-solutions) ### About Author ![Nick Skelton](https://blog.brewerscience.com/hubfs/0.jpeg) Nick Skelton Related Posts [![What is temporary bonding and why is it needed?](https://blog.brewerscience.com/hs-fs/hub/51396/file-2618900946.jpg) What is temporary bonding and why is it needed?](https://blog.brewerscience.com/what-is-temporary-bonding-and-why-is-it-needed) [![Process methodologies for temporary thin wafer handling solutions](https://blog.brewerscience.com/hs-fs/file-36002329-png/images/types_of_debonding.png) Process methodologies for temporary thin wafer handling solutions](https://blog.brewerscience.com/blog/bid/96431/process-methodologies-for-temporary-thin-wafer-handling-solutions) [![Supply chain flexibility for 3D device packaging](https://blog.brewerscience.com/hs-fs/file-14394235-jpg/images/3d-flowchart-500.jpg) Supply chain flexibility for 3D device packaging](https://blog.brewerscience.com/blog/bid/81672/supply-chain-flexibility-for-3d-device-packaging) - - - - ### Comment ## Subscribe To Blog ### Subscribe to Email Updates ### contact **Brewer Science, Inc.** 2401 Brewer Dr. Rolla, MO 65401 Call us: ([573)364-0300](tel:+1800123456) ### support At Brewer Science, our customer relationships don’t end when you buy materials and equipment. Because we want to work hand-in-hand to get your processes perfect, we’ve empowered an extensive applications and support team to help with all your processing needs. [SUPPORT@BREWERSCIENCE.COM](mailto:SUPPORT@BREWERSCIENCE.COM) [Locations](https://blog.brewerscience.com/about-us/locations/) ### Recent Posts ### connect with us @ 2018 Brewer Science, inc.