The Presto laser scriber is a compact lab system for research and development. It allows for reliable, precise and quick scribing of thin-film solar modules in CdTe-, aSi/µSi- and CIGS substrates. The system is designed for ultimate flexibility and is especially suited for determining optimal process parameters for series production. All parameters can be transferred directly to Allegro laser scribers.
Different laser sources The LPKF Presto can be equipped with several different laser sources (355, 532 and/or 1064 nm), pulse lengths (nano-/picoseconds), different optical configurations and a mechanical machining head. Combining the different configurations provides for a wide range of possible parameters. - Full flexibility: scribing from the film or non-film side of the glass - High performance: scribe substrates at up to 2 m/s - Precision guide: built-in image referencing system used to determine the coordinates for P2/P3 and for optical inspection - Clean process: reliable vacuuming and filtration of ablation products
Since the founding of the company, motion control technology has been one of our core competences and has always formed the basis for the speed, precision and reliability of all LPKF processing systems.
The digital axis controllers in the LPKF DAC1005 series are able to precisely and dynamically control linear drives as well as direct current and 2- or 3-phase step motors. They have a multitude of interfaces and are efficient when used for distributed control tasks.
The core of the DAC1005 series are high-performance controllers based on PID and model-based algorithms, that take into account maximum speed and acceleration as well as optimal jerk. With regard to control quality, the LPKF DAC series is setting benchmarks in comparison to similar axis controllers on the market.
LPKF Laser Transfer Printing (LTP) combines the best of two worlds: the accuracy and flexibility of a laser-based digital printing process and the application options offered by screen printing.
With the LTP process, highly filled printing inks can be transferred with previously unknown micron-range precision to flat substrates, even in multiple passes for thick coatings in combination with filigree structures.
At the core of the LPKF LTP printer are laser print heads with application-specific designs. They each consist of a printing unit and an extremely fast scanner-based laser beam guide.
In the printing unit, a rotating target that is transparent to laser radiation is continuously and homogeneously coated with the ink for printing. Inside this, the laser beam is guided extremely rapidly over the target to perform the printing operation.
The first system in the product line was developed for printing on vehicle glass. The LTP vehicle glass printer is equipped with fast linear axes based on a gantry design. The axis system can hold several print heads for various inks or for optimizing cycle times.
The machine base can be scaled to accommodate different glass sizes. The system is completely enclosed and climate-controlled to ensure optimized process conditions, regardless of the conditions of the surroundings.
Allegro laser systems are used for all processes associated with laser structuring (laser scribing) thin-film solar cells. Whether CIGS, CIS, aSi, aSi/µSi or CdTe, depending on the actual thin-film technology Allegro systems are equipped with the corresponding optimal laser sources and can be equipped for machining from the film- or non-film side of glass. The system modularity accommodates various substrate sizes. The Allegro series combines the ultimate performance and profitability in laser scribing.
Highest throughput Icon Highest ThroughputThe motion of the dynamically optimal component, a compact machining head with multiple parallel machining beams, allows for maximum acceleration and speed to reduce the machining time inside the Laser Scriber. A single machining step simultaneously delivers multiple structures, and substrate handling processes are parallelized to the greatest extent possible. This increases machine output while reducing production costs.
Optimum availability Icon Optimum AvailabiltyFrom a construction perspective Allegro laser scribers are rugged, low-maintenance and designed to be easy to maintain: with maintenance-free air bearings for transporting glass and moving the scribing head, long-life laser sources and pre-aligned optical and mechanical components. This effectively reduces scheduled and unscheduled downtimes, increasing system availability.
Cost efficiency Icon Cost EfficiencyOptimized machine dynamics, accurate structuring and the minimum-cost machine design make the Allegro laser scriber particularly profitable production equipment for thin-film solar modules.
Maximum module efficiency Icon Maximum Module EfficiencyThe cell with the lowest performance significantly determines the module’s performance. It is therefore important to produce a high-precision pattern with uniform cell size distribution in step P1. The subsequent P2 and P3 lines are accurately aligned and positioned based on this master. An ultra-precision P1 Allegro and the Dynamic Path Tracking in the P2 and P3 Allegros reduce the “dead zone” to maximize module power.
The LPKF SolarMaster graphical user interface has been specifically developed for the Allegro and Presto laser scribers and is installed on both systems. Ergonomic factors were taken into account in the software development and resulted in an intuitive graphical user interface. SolarMaster features various user levels to assign access to machine functions according to the specific responsibilities in production.
SolarMaster covers all the requirements of industrial production: - Quick and easy scribing recipe definition - Group recipes to combine individual recipes with different process parameters - Auto-inspect function, can be automated within a recipe - Support functions (wizards) to determine process windows with automatic switching of parameters and determination of focal position - Maintenance interval indicator for individual parts - OPC server or SECSGem interfaces for MES systems
Making an important contribution to the environment: laser systems and processes from LPKF SolarQuipment GmbH, headquartered in Suhl, Germany, are being used to manufacture extremely high-capacity thin-film solar modules. This module technology offers low resource consumption, good performance at low light intensities, and imperviousness to temperature fluctuations. However, processing is complicated, as the solar modules must be divided into cells connected in series, requiring several production steps.
This task can be done especially rapidly and precisely by LPKF’s Allegro series laser scribers. These laser scribers can structure thin-film solar cells with sizes of up to 1.5 x 2.5 m. They accomplish this in multiple passes with such a high precision that the module performance is significantly increased.
Drawing on extensive experience in the highly dynamic field of glass processing, LPKF SolarQuipment is developing a new technology for digital printing of surfaces with highly filled inks or pastes. In a laser-induced print process called “Laser Transfer Printing” (LTP), the ink or paste is transferred to flat components such as glass or ceramics at high speed. The LTP technology combines the flexibility of a digital printing process with the possibility of printing large ceramic pigment particles. This makes it unique in the market and opens up new application areas such as customized printing of logos, serial numbers, and barcodes on automotive and architectural glass.
LPKF SolarQuipment GmbH, with headquarters in the German city of Suhl, employs around 100 people. Product development and production take place in Suhl, whereas process and technology development are performed at the Garbsen location (near Hanover). Thanks to the integration of SolarQuipment into the LPKF Group, customers and service technicians can now access a global 24/7 network with service hubs in North America, Europe, and Asia.