THIEME Solar

THIEME Srceen-printing line for the cost-efficient printing of silicon wafers

Control

Loading System/ Wafer Handling

Printing Unit

Printing Table/ Print Nest

Control Systems

Paste Feed

Continuous Dryers

The fully automatic THIEME screen-printing system for the precision printing of silicon wafers is conceived as a rotary cycle system with specially developed printing nests. Equipped with integrated material transport systems, inline quality control systems and effective paste curing, THIEME ensures a cost-efficient process.

Operator friendly

Centralised, user friendly control unit at every printing station

Precision

Precise transfer of the wafers to the printing table

Short set-up times

Simple operation and short set-up times through special features

Optimum print quality

The print nest with vacuum exhaust and paper support ensures a excellent print quality

High process security

Immediately after printing, a quality control function is carried out by camera systems in the print station

High operational efficiency

Through the use of an automatic paste dispensing system, the paste is maintained at a constant level in the screen

Low breakage rate

As no handling is necessary for drying, there is no risk of breakage of the wafers

The system concept ensures a stress-free printing on the wafers and a precice material transport

More information can be downloaded as PDF file: Brochure - THIEME Solar [952 KB]
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Your contact
USA/Canada : Bernd Klammer, Phone +1-630-5 13-16 66
Great Britain: Andrew Kippax, Phone +44 (0) 1484 51 13 33
For all other countries: Klaus Messmer, Phone +49 (0) 7641 583-524

Contact form

Control
Every print station has a central operating unit from where the line components can be controlled:
    � Loading system
    � Print station
    � Control system
    � Dryer

Loading System/Wafer Handling
The loading system can be designed either as an inline solution or stack box pick-up, depending
on the customer requirements. The integrated breakage control vision system in the loading unit
ensures that two undamaged wafers at a time are deposited on the print nest. The handling system
with camera positioning system ensures the precise transfer of the wafers to the printing table.

Printing Unit
Performance features of the printing unit:
� absolute reproducibility of the print parameters
� self-adjusting squeegee system
� large process window for the respective print parameters
� low mechanical load on the wafers

Simple operation and short set-up times due to:
� screen change without removing the squeegee and floodbar
� automatic screen positioning with a camera vision system
� squeegee and floodbar quick-action clamping systems
� self-adjusting pressure for the printbeam
� operator friendly access to the underside of the screen due to cleaning position of the printing unit

Printing Table/Print Nest
The special designed print nest is equipped with a paper support which ensures a consistent clean printing
table surface. After a screen changeover, the roll-to-roll paper support can be used as a test print substrate
to avoid the usage of wafers for set-up. The paper feed/transport ensures a fluent and streamlined wafer
transport to the following stations.

Control Systems
The wafers are inspected for breakages and print quality through backlightning the
print nest and vision inspection. Faulty parts are recognized immediately and
automatically removed from the production line.
The print nest is also checked for contamination and then released for reloading.
In the case of contamination, a clean table surface is automatically provided with the
aid of the paper feed through the integrated roll-to-roll device.
The whole control process has no influence on the cycle time of the print station.

Automatic Paste Feed
Through the use of an automatic paste dispensing system, the paste is maintained at a constant level
in the screen and the overall line uptime is further enhanced.
The feed systems are adapted for an optimum process sequence depending on the customer�s print paste.

Continuous Dryers
Continuous dryers utilizing hot air and IR radiation carry out rapid and thorough
drying of the pastes.
As no handling is necessary for drying, there is no risk of breakage of the wafers.