We utilize a closed-loop modified Siemens process to produce high quality polysilicon. We have implemented a quality management system to ensure the quality of our products. We are currently applied for successfully combined the strong industry know-how with our in-house expertise, and several patents based on our innovation.
Medium to large blocks of solar-grade polysilicon are produced using our chemical vapor deposition process reactors. To avoid surface contamination we fragment and package our Polysilicon crystals in our clean room.
|Parameters||Premium Grade||High Grade||Standard Grade||Test Method|
|N-Type, Resistivity (Ω ? cm)||≥ 100||≥ 40||≥ 20||4-Pts|
|Phosphorus Content (ppba)||≤ 1.5||≤ 3.76||≤ 7.74||LT-FTIR|
|P-Type, Resistivity (Ω ? cm)||≥ 500||≥ 200||≥ 100||Hot Probe Method|
|Boron Content (ppba)||≤ 0.5||≤ 1.3||≤ 2.7||LT-FTIR|
|Surface Metal Content (ppbw)||< 10||< 50||< 500||ICP-MS|
|Details||Unit||Minimum Size||Maximum Size|
|85% polysilicon crystal block size within 25-200 mm||mm||> 3||< 200|
|We implement stringent quality controls to ensure each batch of product are tested within the above parameters.|
|Methodology||Unit||Bag Content||Box Content||Notes|
|Double layer polyethylene bag in outer bag packaging||kg||5||20||Lot & weight label|
|Each invoice lists details of producing factory and customer, purchase order number and product information.|