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Machine Tools / Power Tools
Laser Technology / Electronics
Medical Technology
Solar cell production with TRUMPF:
Getting moreout of the
sun.
2
Double the knowledge
solar cells.for better
The highest levels of effi ciency and production in cycles only
seconds long: TRUMPF’s innovative products can help you
fi nd new approaches to solar module production. We are
opening up new opportunities for solar cell manufacturers
and facility builders. In addition, you will receive the support
you need for your project through the combined experience
and comprehensive, worldwide service from two leading
technologically innovative TRUMPF Group companies.
Contents:
Page 4 Thin fi lm cells: Precise and productive across large areas.
Page 7 Crystalline silicon: Advantageous for more effi cient cells.
Page 10 More service worldwide.
Page 12 Products: Find everything you need in our vast product portfolio.
3
TRUMPF: Technology and world market leader in lasers and laser systems.TRUMPF promotes the development of industrial lasers. For the
effi cient manufacturing of solar cells, TRUMPF has lasers with
short pulses at a higher average output. An example of this
is the picosecond laser that is used to structure thin layers
of molybdenum and achieve excellent quality at a high
productivity level.
Whether it‘s a job requiring patterning, edge deletion, edge
insulating, removal, structuring, cutting, drilling or marking:
at TRUMPF you will fi nd lasers of all wavelengths and in many
confi gurations. In short, you will always fi nd the right laser
whatever your application. The standardized, reliable laser
solutions from TRUMPF have been used for many years in
many industries.
HUETTINGER Elektronic: The innovator for generators.HUETTINGER Elektronic, a member of the TRUMPF Group since
1990, is the worldwide, forward-looking supplier of generators
for coating large surfaces, such as architectural glass and fl at
panel displays. You will benefi t from this comprehensive
know ledge when it comes to developing reliable, stable processes
for the production of homogenous coatings – both with DC
as well as MF and RF technology for various materials.
You can also rely on HUETTINGER‘s experience for the growing
of silicon crystals for solar cell production. HUETTINGER is a
leader in fl oating zone processes.
Preciseand productive across
large areas.
Thin fi lm cells:
HUETTINGER generators and TRUMPF lasers offer ideal features for effi cient
manu-facturing of affordable thin fi lm solar modules. Conductive and photo-active
coatings are applied in front-end production. After each coating, the laser is used
to structure the surface. The individual cells and their circuitry emerge as a result.
Our expertise in coating and structuring the modules simplifi es your path to inno vative
solutions. In the back-end, the edges are deleted with a laser and contacts are
applied to the module.
5
Patterning: Precision and speed.Structuring with the laser, also called patterning, divides thin
fi lm modules and wires up the generated cells. In the sunlight,
the charge carriers in the cells are separated and the current
fl ows through the contacts generated by structuring the edge
of the solar module. The precise, selective and contact-free
laser processing is dependable with short processing times.
Nanosecond lasers can also be used for the production of
modules with amorphous silicon and cadmium telluride.
Entirely new areas of application are acheived by innovative
pico second lasers from TRUMPF. There is no molten material
due to its short pulses. You can use it to remove the
molybdenum in CIS modules at a higher speed and without
cracks. “Cold” processing of the photo-active layer with
ultra-short laser pulses also offers high quality and
productivity advantages over mechanical processes.
Coating with plasma support: Impressive results.If you optimize cells with homogenous front and back contact
layers, you can achieve considerably higher levels of effi ciency.
HUETTINGER generators create the plasma used to apply
these layers through the magnetron sputter or PECVD process.
Their DC technology is ideal particularly for applying
high-quality coatings – and it’s also affordable.
Removal and edge deletion: Superior features.For stripping the coatings, TRUMPF lasers are the affordable
solution for a high fl ow rate. Large-area removal is performed
on the edge of the module by dividing up the large areas to
ensure constant lamination. For this purpose, the use of lasers
is cleaner than sandblasting and easier to integrate into the line.
With TRUMPF lasers, you can rely on high performance for
short cycle times. In addition, if you distribute the energy to
numerous workstations with laser light cables, the laser power
from one station can be used at another during loading and
unloading cycles, increasing overall productivity.
Schematic design of a production line of thin layer modules with TRUMPF and HUETTINGER components.
PEC
VD
coa
ting
with
gen
erat
ors
Sputtering with generator
Patterning 1with laser
Patterning 2with laser
Coatedglass
Edge strippingwith laser
Patterning 3with laser
7
Crystalline silicon:
cells.
Advantageousfor more effi cient
Products from the TRUMPF Group open up new options for
producing crystalline solar cells. For pulling crystals, induction
warming using HUETTINGER generators creates a more
homogenous, perfect silicon ingot than any other method.
Generators from HUETTINGER ensure reliable processes for
the homogenous coating of solar cells. Laser processing leads
to solar cells with a higher level of performance. For example,
use of reverse side contacting is currently being discussed.
Lasers work contact-free and can be positioned quickly.
And, they don’t generate mechanical stress.
Coatings: For more or less refl ection.An optimized crystalline cell with an anti-refl ex and reverse
contact layer can achieve a considerably better level of
effi ciency. HUETTINGER generators produce the plasma for
applying these layers through a magnetron sputter or PECVD
process. Thanks to its ideal features, such as arc management,
the cells receive particularly high quality coatings.
Silicon ingots: Pulling is worthwhile.If you want to achieve the highest quality in inductive
zone pulling of silicon crystals, generators and inductors
from HUETTINGER are the machines of choice. You will
achieve excellent results with their constant and controlled
processes – ingots without crystal defects or chips, which
are best suited for further processing.
Cutting or drilling: New concepts to better use the surface area.When cutting out wafers, a TRUMPF laser separates the silicon
with equal precision and speed. In addition, the shadowing on
the front side of a solar cell can be reduced by applying
contacts on the reverse side and drilling inlet holes with the
laser. A TRUMPF laser does this in the production cycle. And
the drill holes cover less than 1 percent of the surface area.
Drilling for reverse side contacting.
Zone pulling. Cutting. Coating.
9
Deleting insulating layers.
Reverse side contacting: Effi ciency increases.To increase refl ectivity on the reverse side and to avoid electrical
losses, a transparent insulating layer and a metallic coating are
applied across a large area. The laser allows you to achieve
targeted contacting on the reverse side of the solar cell with
the lowest output losses on the contact points. There are two
ways to do this: Either you use the laser to shoot the contacts
through the layer system onto the wafer, known as laser fi red
contacts, or you use the laser to remove the insulating layers
before the metal coating is applied. With selective removal of
the insulating layer, ultra-short pulses operate without added
heat creating disruptions in the silicon.
Edge insulation: No short-circuit – thanks to the laser.Due to the circumferential doping, short-circuits automatically
develop on the front and reverse side of a crystalline solar cell
during production. When the laser is used to insulate edges,
it generates a separating line at lightning speed that reliably
eliminates the short-circuit.
Low-contact contacting: Inductively or with the laser.There are two extremely fast, reliable and contact-free processes
for soldering contacts to the solar cell: using a TRUMPF laser or
a HUETTINGER generator and inductor. We will help you select
the best process for you. Both the laser as well as the generator
reduce scrap and are compact enough to be integrated into
a production line. To best match the inductor to your
application, HUETTINGER develops it with you and tests it
in their applications lab.
Also, you can count on TRUMPF if you are looking for a laser
for marking solar cells. You will no doubt fi nd a suitable solution
in our comprehensive product portfolio.
Edge insulation. Contacting conductor paths. Soldering modules.
10
serviceworldwide.
More
Thousands of application tests performed annually in the application center.Feasibility studies in one of our application centers are a central
component of our basic consulting services prior to purchase.
Either you will learn exactly which TRUMPF laser, beam guidance
and parameters you need for your application or you will see
which HUETTINGER generator and which inductor design will
provide the optimal features for your process.
TRUMPF offers you comprehensive support around the world.
Our service begins long before you even decide on a solution.
We provide comprehensive consulting services to help you
defi ne the process and fi gure out which solution you really need.
11
All around support – even after purchase.We will support you worldwide with customized services
through the entire service life of your system. Our experienced
application technicians will help you install and start up your
processes. We will assist you with maintenance and train your
employees. We keep downtime and technician visits to a
mini mum because by using remote diagnostics or Telepresence,
our specialists can, with your permission, access your system
online and solve problems.
12
Products:
Find everything you need
in our vastportfolio.
13
TRUMPF lasers and HUETTINGER generators offer a broad
range of products for use in the production of solar cells.
TRUMPF: The right laser for every application.You can be sure that you will always get the best laser
for your individual application from TRUMPF‘s extensive
product portfolio.
Our nanosecond lasers have proven themselves time and again
when it comes to edge insulation and drilling crystalline solar
cells. Lasers from the TruMicro Series 5000 are powerful
pico-second lasers. They are used for extremely sophisticated
surface treatment, such as highly productive and precise
removal. They are available in three wavelengths: 1030 nm,
515 nm and 343 nm. And with the TruMicro Series 7000,
you can quickly cut, drill, ablate or remove large-area layers,
thanks to laser outputs of up to 750 watts.
Lasers from the TruMark Series 6000 also cover all three
essential wavelengths: from infrared with 1064 nm to 532 nm
up to UV lasers with 355 nm. Lasers from this series are used
for wafer marking and patterning. They are not only extremely
easy to integrate into the production lines, they can also be
operated on any power grid on Earth. This also applies to the
TruMark Series 3000 that is even more compact.
Whether used for welding modules, cutting the most
sophisticated contours or drilling small holes, the lasers
from the TruDisk, TruFiber and TruPulse Series have the best
features for applications in module production and processing.
HUETTINGER: Generators for your applications. The generators from HUETTINGER – proven a thousand times
over – are the best starting point for stable processes in the
production of solar cells. We offer a large selection of DC,
medium frequency and high frequency power supplies for
induction heating and plasma excitation. This means you can
select the exact generator for the requirements of your system
such as thin-layer or wafer-based cells and coating material
through sputtering or a PECVD process. Whatever your
requirements, you can rely on our well-known rapid and
reliable arc management. Even substrates more than 6.5 feet
wide are no problem for generators from the world market
leader for fl at panel display and architectural glass coatings.
There are generators that are ideal for manufacturing solar
cells in every category – the one you pick depends entirely
on your tasks.
The DC generators from the TruPlasma DC Series 3000 are
an affordable start in plasma excitation. The excellent arc
management, CompensateLine, ensures particularly smooth
and clean process results. Therefore, these generators are
ideal for a multitude of coating processes, such as the
sputtering of aluminum. With the medium frequency
generators from the TruPlasma MF Series 7000, you will
achieve very high process reliability.
15
The fast, well-engineered arc management system,
DetectLine, permits extraordinarily homogenous and high
quality layers to be produced, which results in reliable
processing of many different materials. Flexible interfaces
allow for simple integra tion into any type of system design.
And, the high frequency generators from the TruHeat HF
Series 7000 offer you the very best results as well as
maximum stability. And, HUETTINGER will help you with
inductor design.
TRUMPF Laser Technology Center· Plymouth Township · MI 48170Phone 734 454 7200 · Fax 734 354 9769 · E-mail: [email protected] · Homepage www.us.trumpf.com
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TRUMPF is certifi ed according to DIN EN ISO 9001 and VDA 6.4