BAK Evaporators
Platforms from 0.5 to 1.4 meters with 50 years of process know-how
The BAK – Pushing boundaries in evaporation technology
Power Devices
- Backside Metallization with best materials utilization
- Precision and repeatability in “lift off”
Wireless
- Advanced solutions - IDT electrodes for TF-SAW
- Automated handling solutions for best CoO
Precision Optics
- From UV to IR - Delivering new levels of process control
- BB and hybrid Optical monitoring direct up to ????nm
MEMS
- Outstanding platform flexibility for deposition of metals, dielectrics, TCOs
- Co-evaporation processes - from quantum computing to digital scintillators
There's a BAK thats perfect for you
With new levels of flexibility, and new levels of process control the BAK Evaporator is the industry leader in selected applications across Power Device, Wireless, MEMS, Optoelectronics and Photonics applications. There is a BAK thats suitable for everyone - from the compact BAK 501, perfect for universities and research institutions to the BAK 1401, a production giant. When it comes to substrate loading, BAK tools are available in different formats - from fully traditional fully manual to semi automatic and fully automated
And now the new "Multi BAK" is setting new standards
click here to go straight to the Multi BAK
The BAK name has always stood for innovation and now the Multi BAK is setting new standards: driving throughout up and driving down costs of ownership in the highest volume applications
Integrating up to to 4 BAK process chambers around a central atmospheric handler , the Multi BAK delivers "cassette to cassette" processing - eliminating all manual processing with innovative handling and load lock technology that reduces process times, helps you achieve new levels off process repeatability and reduce tool energy consumption in the highest volume applications
Want immediate help?
Contact us to specify a BAK or a Multi BAK that's perfect for your process requirements, substrate size and throughput.
Major BAK system components - A quick guide
Click on the individual sections in the circle for a quick overview, and then find more information further down the page.
BAK sizes
With a whole range of sizes from the BAK 501 to the BAK 1401 there is bound to be a size that fits for your process, substrate size and throughput requirements. But thats not all :
- Split chamber ( SC) versions maintain process sources under vacuum during substate load , reducing pumping times, increasing throughput
- Extended throw versions come with modified chambers for "lift off" processes whilst custom processes calling for integration of moveable linear ion mills can be accommodated with chamber rear extensions
Substrate handling
BAK tools can be configured with different handling options according to process requirement, substrate size and throughput:
- Manual front side "substrate" or "segment" loading
- Atmospheric loading assist for segments using "Lazy Susan"
Sources
- Deposition: From boats to barrel sources high temperature sources and a whole range of e gun configurations , Evatec design and builds its own sources to give the you the best in materials utilisation and reliability. Wire and granular automatic feed options for e gun support extended source operation before replenishment
- Etch: Round and moveable linear sources deliver high rate, accurate in-situ deposition and etch processes.
- IAD: Improved film qualities, lower process temperature, and shorter process times.
- Substrate conditioning: Glow discharge
Process Control
Evatec know-how in process control ensures precise layer termination for deposition of metals, TCOs, dielectrics and piezoelectric materials
Choose from:
- Evatec quartz crystal monitoring systems in single or multi head configurations for complex processes. e.g A central quartz system can be combined with lateral single head quartz systems ( for rate control in the shutter, non uniformities or in co evaporation
- Monochromatic or broadband optical monitoring for direct monitoring in different wavelength ranges in UV,VIS and IR according to customer requirements ( e.g from 260 to 980nm or from 380 to 1700nm) a range to test glass changers fir indirect monitoring are also available
- Evatec knowhow in chamber conditioning (degassing), plus "front" or "backside" (dome) heating capabilities for substrate temperature management ensure process conditions are precise and repeatable.
Substrate carrier
We offer a wide variety of dome systems, including flip, flex planetary, and combinations thereof. We can handle almost all shapes and sizes of substates . We also accommodate special requests
Sustainability
Evatec BAK platforms are designed to reduce use of resources in their daily use:
- Know-how such as "Unicalc" for uniformity shield design ensures the most effective use of consumables during evaporation processes.
- Vacuum system design in our "split chamber" and "Multi BAK" systems reduces pumping volumes and energy consumption.
Vacuum management
- Your BAK is equipped with various cryopumps , also capable for reactive processes
- Additional messier traps to remove water from the chamber improve pump performance
- Process chambers are continuously monitored to ensure stable, repeatable process conditions . Optional Residual Gas Analyzers can also be integrated to analyze atomic and molecular masses inside the vacuum chamber.
Get Started
Get started with the BAK - from sizes to sources, a quick introduction to the BAK family.
More about BAK Geometries
Get an overview of the different geometry types optimized for different processes.
Sources & Tooling Know-how
Benefit from Evatec's 50 years production know-how in Tooling, Source and Process Control Solutions.
The Multi BAK - take a leap forward
Opening up new fully automated possibilities - clustering multiple BAKs around a central handler for high volume applications across wireless, power and optoelectronics.
Get started with configuring a BAK - A quick guide if you are new to the technology
Step 1
Consider your typical substate and batch sizes
If you working with traditional manual loading of substrates start by selecting a basic platform size according to your preferred substrate size and fab batch processing capacity.
Step 2
Already know what kinds of sources and process accessories you need?
Take a quick look at our portfolio of sources and process accessories on the right - from effusion cells and digital beam sweep electron beam guns, to chamber heating and plasma sources for PIAD. Evatec advanced process control technologies including quartz and optical monitoring mean that levels of precision and repeatability in thin film deposition are better than ever.
Read more in the GSM brochure.
Do you need help?
But don't worry if you are not sure what combination of technologies are best for you. Our specialist are here to help.
Step 3
Configure your BAK according to your processes and fab integration requirements
Evatec can configure and build a BAK with process geometries, substrate tooling and handling options that fit for you. Here are some typical examples of how we can help
- "Lift Off" platforms with extended throw for processes requiring zero side wall coverage
- "Split Chamber" platforms. These are ideal for processing of sensitive source materials which must be kept under vacuum. Reduced pumping requirements also bring further benefits of reduced batch cycle times
- Automation options such as robot calotte load (Lazy Susan) of a single BAK pen up new possibilities for driving up throughput and yield in volume manufacturing
- Custom motor driven tooling options managing coating geometries - from variable angle to active source / substrate separation
Step 4
Let us help you
Whatever configuration you choose, all our BAK family members come with 50 years of process know-how across applications in power, wireless, MEMS, optoelectronics and photonics. This means ensure the correct layer stoichiometries and film uniformities all using Evatec know know to ensure highest materials utilisations and lowest cost of ownership in production
Find the right solution for your process and throughput
Our specialists will work with you to understand your substrates, film specs and handling requirements to then specify the ideal system size and configuration.
Got a BAK already?
Extend the life of your existing BAK with new process capabilities or the latest modern control systems.
Want to learn more?
Get the complete overview about the BAK Family.
More about BAK Geometries
Standard Throw
Evatec has delivered in excess of 2000 BAK evaporators to the market, the majority of which are "standard throw", configured for conventional high precision coating processes on 2D and 2.5D substrates.
From the compact 0.5 meter BAK 501, optimized for university R&D to the giant BAK 1401 handling 28 pieces of 8 inch substrates in a single batch our systems can all be equipped with Evatec's own source and process control technologies to ensure high precision processes across in semiconductor, optoelectronics and photonics.
Choosing an Evatec evaporator means you can be confident
- you have access to the widest range of source technologies including thermal sources, effusion cells and e-guns
- you have access to Evatec's in situ quartz and optical monitoring know-how for precise layer termination
- you can gain access to our engineers experience engineering custom tooling options fit for production
- you can retrofit or upgrade your BAK in years to come as your process requirements change
Lift Off / Extended Throw
Evatec 'lift off' systems have extended throw for process geometries where subsequent film patterning steps call for zero side wall coverage.
Extended throw system benefits
- Best control of 'lift off' processes
- Retention of full chamber flexibility for any future process requirements
Evatec 'lift off' systems use all the proven source and process control components of our standard throw platforms such as our EBS E gun technology and our Khan system and process controller but have lowered source chambers according to calotte geometry and substrate size to achieve the correct working distances required during evaporation. They are available in a wide range of platform sizes.
Just like standard throw systems however, "Lift Off" systems can also be specified in Split Chamber format for handling sensitive coating materials or for driving up substrate throughput by lowering cycle times.
Looking for even more flexibility?
Ask about Evatec’s custom engineering solutions with interchangeable or motor driven tooling enabling both standard and "lift off" processes to be run easily in the same chamber as well as chamber configurations to run "in-situ" high uniformity etch prior to dep.
Split Chamber
Evatec "Split Chamber" systems integrate a valve between source and substrate chamber, allowing the sources to be kept 'ready' under vacuum during main chamber vent and substrate load/unload.
Split chamber benefits in a nutshell
- Ultra-stable source performance
- Shortened batch times for enhanced throughputs
- Ideal for doping processes, handling of reactive or sensitive coating materials
- "Pull out" configuration for source makes for rapid source maintenance / replenishment.
"Split Chamber" systems are already a well proven part of the Evatec BAK family. They use proven EBS E Gun technology and our Khan system and process controller. Taking the best from our well know 'Samson' platforms delivered previously, our new generation systems make life even easier with slide out source chambers for rapid refill and maintenance, a wider range of source technologies like extended capacity e guns or effusion cells, and the most accurate quartz and GSM optical monitoring control techniques ever with 'on line re-optimization' mid process for the most demanding thin film stack designs.
Sources & Tooling Know-how
Sources & Thickness Control
Your BAK is ready for installation of a whole range of deposition and etch sources, but also a whole range or accessories essential for precision processes. From front and backside heating to "insitu" process monitoring technologies which adapt and tune processes "on the fly" Evatec solutions support repeatability and process yield.
BAK chamber base plate and side walls come with a series of standard feedthroughs enabling installation of the combinations of deposition, etch, and process accessories required for layer processing.
All our sources are engineered for 24/7 production, robust and easy to maintain, optimized for the lowest materials utilization and the best repeatability. You can read more about our range of sources in the BAK family brochure.
As process requirements change in the future, simply reconfigure your system by moving, exchanging or adding new ones, reconfigure your “Khan” control system in just a few minutes and you are ready to go. Control rates and terminate your layers with Evatec’s QCM quartz monitoring technology at 5 or 6MHz featuring high sampling rates, high speed switch between crystals and simultaneous control of up to 4 quartz heads from a single controller. For real time direct measurement of optical layer performance during deposition choose monochromatic or direct broadband optical monitoring techniques with direct monitoring between 380 and 1700nm for UV, VIS and IR processes.
Tooling
Evatec’s portfolio of tooling solutions is designed to maximize batch capacity for evaporation processes without compromise on film quality. Choose from single piece and segmented domes with standard geometries or flip systems for double sided processes.
For high rate metallization our range of planetary system designs enables larger batch sizes and lowest materials utilization and for complex substrate geometries our engineering department offers a bespoke design service.
Buying a new Evatec tool is just the first step in a long term partnership. From initial ramp up support to ongoing maintenance or retrofits adding new capabilities, maximise both uptime and tool working life together with Evatec’s local customer service teams.
- We can help you plan and manage your stocks
- Use our exchange programmes to minimize downtimes
- Our local Field Service Engineers on hand when you need us
- Maximizing output - From Continuous Improvement Programmes (CIP) to new process installations
- Add new capabilities to support your technology roadmaps
- Helping you extend tool working life
- Helping you to help yourself
- Tailored just for you - At Evatec or in your own fab
Read more about the BAK Family in our LAYERS magazine
Multi BAK – Pushing Boundaries in Evaporation Technology
Europe – A powerhouse in III-V solar cells manufacturing
Learn how Evatec evaporation solutions on the BAK and the latest substrate handling options are helping customers deliver the process repeatabilities and high production yields essential for successful manufacture of III-V solar cells.
