Silicon Crystallization Unit (SCU450-650)
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ALD Vacuum Technologies High Tech is our Business SCU450 and SCU650 Solar-grade Silicon Crystallization Units for MultiCrystalline and Mono-Crystalline Ingot Production

Uniform heat flux and flat temperature profile by using top & bottom heating ALD’s Family of Silicon Crystallization Units (SCU) for Solar-grade Ingot Production ALD´s crystallization units are stand-alone furnaces for melting and crystallizing of solar-grade silicon into an ingot for subsequent processing into wafers for solar cells. They are based on top and bottom heating and produce one high quality square multi-crystalline or mono-crystalline ingot per cycle. Unique Crucible Size Range: Gen5 and Gen6 The SCU450 series furnace is available for use of Gen5 crucible generation with a...

MULTI- AND MONOCRYSTALLINE INGOT PRODUCTION from the Technology Leader I First to introduce Gen5 furnace (SCU450) I First to introduce Gen6 furnace (SCU650) I First to introduce Mono 2TM process (patented technology) I Modular hot zone for a minimum down time during maintenance and for future update to Gen6 when additional productivity is required I Dual-layer spill protection shield with double layer of copper and refractory tiles, PLC-safety interlocks, permanent bottom heater monitoring and high cross-section chamber pressure relief device I Mono 2TM upgrade only available from ALD using...

Typical Mono 2TM seed plate, which initiates uniform crystal growth of mono-crystalline ingots I The only company with patented Mono 2TM know-how I Higher cell efficiencies than large grain DS I Lower manufacturing cost than mono-CZ I Decreased light-induced degradation (LID) effect due to lower oxygen content Industry Standard Alkaline Etch Wafer and Cell Processing Less reflectance loss for higher module power and attractive black module appearance SEM image of a pyramid-etch Mono 2TM wafer Typical Mono 2TM ingot which can be cut into 5x5 Mono 2TM bricks I Compatible with existing CZ-cell...

MONO2TM CRYSTALLIZATION Unique, patented process technology for mono-crystalline ingot production Mono 2TM Technology Transfer includes: I Process for ingots grown from seed plates I Technology for seed manufacturing and replication methods I Instrumentation for controlled start of crystallization I License to use instrumentation and software for constant crystallization rate ingot growth 8,030,633 US 7,758,696 US 8,048,221 US additional patents pending Mono 2TM ingot with monocrystalline brick structure Mono 2TM Process Principle I Load mono-crystalline seed-plate at crucible bottom I Load...

SCU650 GEN6 INGOTS Higher quality and lower conversion cost I Quality – more inside bricks with no contact to crucible wall I Yield – higher quality inside bricks with Gen6 crucibles I Throughput – faster than any other silicon crystallization furnace manufactured today I Uptime – easy to remove and modular hot zone for a minimum down time during maintenance SCU650 series for Gen6 multicrystalline ingot production with 650 kg charge weight producing 16 inside bricks per ingot I More inside bricks (16/36 = 44 % versus 9/25 = 36 %) with no contact to crucible wall and coating I Higher mass...

HIGH VALUE Engineering & manufacturing from the quality leader I Many years of experience in design and manufacture of vacuum melting furnaces in the solar, aerospace and specialty material industries I Worldwide sales and service network I More than 4 GWp installed base in the world’s leading solar industry companies. I In-house crystallization, Mono2TM pilot line and testing at tech-centers in Germany and USA I ALD Vacuum Technologies GmbH (“ALD”) is the Engineering Systems Division of AMG Advanced Metallurgical Group N.V. I ALD is the world-wide market leader in vacuum metallurgy and the...

Technical Data Ultimate vacuum Connected power Power consumption per cycle Crane hook height Overhead crane capacity Leak rate Inert gas Cycle time Ar-consumption per cycle Cooling water consumption Batch capacity in Gen5 configuration in Gen6 configuration Ingot crystal structure Annual production capacity* (cell power) * Depending on actual crucible dimensions, ingot mass, feedstock quality, wafer thickness, downstream wafering and cell processing. Technical Data Ingot crystal structure Brick crystal structure Cell surface texture/etching Suitable for [100] pyramid texture/alkaline Cell...