Product_Spotlight_SOL9410S_9411 Brochure

New Generation Front-side Metallization Paste for Mono and Multicrystalline WafersIn the race for superior quality and increasing efficiencies, solar cell manufacturers turn to Heraeus to set them apart from their competition. Heraeus has established itself as the leading PV paste developer, as well as the highest quality supplier, through delivering the best performance to cost ratio on the market. SOL9410S and SOL9411 are new generation front-side silver metallization pastes that build on our impressive track record.Optimized for high efficiency and high throughput processing, SOL9410S and SOL9411 were formulated to exceed the quality of our benchmark pastes, SOL9235H and SOL9273MA, in every aspect. The unique chemistry of SOL9410S and SOL9411 enhance the etch of the SiNX:H anti-reflective coating, thus, significantly improving contact while preserving the junction quality on various emitters and wafers.SOL9410S and SOL9411 are optimized for varying emitter depths and concentrations.Product Spotlight SOL9410S/9411Patent PendingKey Benefits• High efficiency • Industry leading performance• Excellent aspect ratio• Excellent contact quality on various emitters and wafers• Cd free• Excellent solderability• Designed for high sheet resistance emitter applicationsTypical PropertiesViscosity: HBT Cone and Plate Viscometer (Brookfield):• 180 – 240 kcps • CPE-51 spindle, @ 1 RPM, 25°CCone and Plate Viscometer (Haake):• 16 – 23 Pas • Plate/cone (Ø = 20 mm, angle = 0.5°), @ 100 s-1, 25°CSolids: 89.5 ± 1%Solderability: • 5 second dip @ 230°C • Sn62, SAC305 • Use with low solids, no clean fluxWafer Types: Mono and multicrystalline AmericasHeraeus Precious MetalsNorth America Conshohocken LLCPhotovoltaics Business Unit24 Union Hill RoadWest Conshohocken, PA 19428USAPhone: +1 (610) 825-6050pv.techservice@heraeus.comwww.pvsilverpaste.comEuropeHeraeus Precious Metals GmbH & Co. KG Photovoltaics Business UnitHeraeusstr. 12-1463450 HanauGermanyPhone: +49 (6181) 35-3544pv-info@heraeus.comwww.pvsilverpaste.comAsia - SingaporeHeraeus MaterialsSingapore Pte Ltd.9 Tuas Ave 5Singapore 639335Phone: +65-6571-7500pv.hmsl@heraeus.comwww.pvsilverpaste.comAsia - TaiwanHeraeus Materials Technology Taiwan Ltd.5F., No.2, Housheng RoadLuzhu TownshipTaoyuan County 338TaiwanPhone: + 886-3-321-9937pv.hmtt@heraeus.comwww.pvsilverpaste.comAsia - ChinaHeraeus Materials Technology Shanghai Ltd.No. 1 Guang Zhong RoadZhuanqiao Town, Minhang DistrictShanghai 201108People’s Republic of ChinaPhone: + 86 (21) 3357-5688pv.hmts@heraeus.comwww.pvsilverpaste.comHigh Aspect RatioSOL9410S and SOL9411 have been formulated to optimize the etching rate and make good electrical contact on lightly doped shallow emitter silicon wafers while minimizing damage to Si surfaces during firing to maintain the junction quality and low saturation current density. Also, the composition of SOL9410S and SOL9411 were especially designed for higher manufacturing throughput and high aspect ratio gridlines to minimize shading while increase line conductivity.High Sheet EmitterIndependent studies at leading R&D institutes confirm that SOL9410S and SOL9411 promote metal precipitate (contact formation mechanism) on high sheet resistance silicon wafers.Recommended Processing GuidelinesPrinting: Design Finger Line Opening Screen Parameter Recommendations= 80 µm325 mesh, 23 µm stainless steel wire, 15 – 23 µm EOM280 mesh, 25 µm stainless steel wire, 15 – 23 µm EOM50 µm – 80 µm 290 mesh, 20 µm stainless steel wire, 15 – 23 µm EOM= 50 µm, seed layer 400 mesh, 18 µm stainless steel wire, 5 – 10 µm EOMSqueegee Durometer 70A ShoreSqueegee Speed = 180 mm/secSqueegee Pressure 50 – 90 N Off-contact Distance 1.1 – 1.7 mmWire Bias 22.5 - 30°SOL9410S/9411100 Ohm/sq90 Ohm/sqDrying: Typically dried in an IR dryer with a set point of approximately 250°C in less than 20 seconds.Firing:Thickness: = 20 µm (fired)Line Resolution (finger width): = 65 µmThinner: RV-354Storage: Store in a dry location at 5°C – 25°C. DO NOT REFRIGERATE.Allow paste to come to room temperature prior to opening. Mix well before using.SOL9411 leads to excellent printing performance, as confirmed by Fraunhofer ISE.*Actual zone settings and belt speed vary with furnace.Furnace Profile Time Above (sec)Temperature 500°C 600°C 700°C 725°CLower Limit(s) 7.0 3.5 2.0 1.5Upper Limit(s) 22.0 10.0 5.0 4.0Q3/2011. Data subject to modifications and amendments.