Production method for improving success rate of multiple rods

A production method and technology of success rate, applied in the field of production to improve the success rate of multiple rods, can solve the problems of increased cost per kilowatt-hour, low production efficiency, long consumption time, etc., to shorten the cycle, improve the success rate, improve the success rate and The effect of the whole rod rate

Inactive Publication Date: 2019-01-18
宁晋松宫电子材料有限公司
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, more than 75% of the materials used in the production of solar cells in this field come from silicon rods. The general production process of silicon rods is: charging → chemical materials → pulling single crystal → taking rods → stopping and cleaning the furnace. Only one piece can be produced. After the production is completed, the furnace needs to be cleaned and the crucible replaced, which takes a long time and reduces production efficiency.
Under market pressure, improving production efficiency has become the only way for enterprises to participate in competition, and multi-rod production has emerged as the times require. Most manufacturers have adopted a single-repeated production process. For example, CN102345157 A discloses a solar Czochralski monocrystalline silicon The production method of continuous re-injection includes the following sequential steps: first loading→first chemical material→secondary feeding→secondary chemical material→pulling single crystal→rod extraction→re-injection→chemical material→pulling single crystal→rod extraction →re-injection→chemical material→pulling single crystal→removing rods→shut down and clean the furnace, but multi-rods can reduce the cost of quartz crucible, but the success rate is still low, about 45%, resulting in an increase in the cost of electricity, The decline in production, how to improve the success rate of multi-rods and increase production is imminent

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Production method for improving success rate of multiple rods
  • Production method for improving success rate of multiple rods
  • Production method for improving success rate of multiple rods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. Raw material processing:

[0036] 1.1 Select the polysilicon material with φ50-80mm and purity of 99.99999% as the no-clean silicon material.

[0037] 1.2 Ultrasonic washing is performed on the selected no-clean polysilicon material, using pure water to further eliminate the silicon powder produced by friction and collision between silicon materials.

[0038] 1.3 The washed polysilicon material is placed in a cleanliness class 100 container for 2.5 hours of air cooling, and slowly poured into the quartz feeding container.

[0039] 2. Single crystal preparation:

[0040] 2.1 Furnace cleaning: each furnace should focus on cleaning important parts such as single crystal furnace pipes, exhaust vents, furnace covers, auxiliary chambers, crosses, graphite parts, etc., and at the same time soak the exhaust pipe in oily substances, specifically 100 # Vacuum pump oil soaked at a constant temperature of 45°C for 30 minutes, after 25 # After rolling the transformer oil at ro...

Embodiment 2

[0049] 1. Raw material processing:

[0050] 1.1 Select the polysilicon material with φ50-80mm and purity of 99.99999% as the no-clean silicon material.

[0051] 1.2 Ultrasonic washing is performed on the selected no-clean polysilicon material, using pure water to further eliminate the silicon powder produced by friction and collision between silicon materials.

[0052] 1.3 The washed polysilicon material is placed in a cleanliness class 100 container for 2.5 hours of air cooling, and slowly poured into the quartz feeding container.

[0053]2. Single crystal preparation:

[0054] 2.1 Furnace cleaning: each furnace should focus on cleaning important parts such as single crystal furnace pipes, exhaust vents, furnace covers, auxiliary chambers, crosses, graphite parts, etc., and at the same time soak the exhaust pipe in oily substances, specifically 100 # Vacuum pump oil soaked at 40°C for 25 minutes, after 25 # After rolling coating with transformer oil at room temperature, so...

Embodiment 3

[0063] 1. Raw material processing:

[0064] 1.1 Select the polysilicon material with φ50-80mm and purity of 99.99999% as the no-clean silicon material.

[0065] 1.2 Ultrasonic washing is performed on the selected no-clean polysilicon material, using pure water to further eliminate the silicon powder produced by friction and collision between silicon materials.

[0066] 1.3 The washed polysilicon material is placed in a cleanliness class 100 container for 2.5 hours of air cooling, and slowly poured into the quartz feeding container.

[0067] 2. Single crystal preparation:

[0068] 2.1 Furnace cleaning: each furnace should focus on cleaning important parts such as single crystal furnace pipes, exhaust vents, furnace covers, auxiliary chambers, crosses, graphite parts, etc., and at the same time soak the exhaust pipe in oily substances, specifically 100 # Vacuum pump oil soaked at a constant temperature of 40°C for 30 minutes, after 25 # After rolling the transformer oil at ro...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a production method for improving the success rate of multiple rods. The production method comprises the following steps: S1, raw material treatment; S2 furnace cleaning operation; S3 feeding; S4 material fusing; S5 secondary feeding; S6 neck guiding; S7 diameter enlarging transferred to be diameter equalizing; S8 ending and S9 taking out, wherein in S2 furnace cleaning operation, an exhaust funnel is subjected to heat preservation soaking for 20-30 minutes with No. 100 vacuum pump oil at the temperature of 40-45 DEG C, then subjected to roll coating through No. 25 transformer oil at the temperature of 20-30 DEG C, and finally soaked in metal processing oil for 10 minutes. The production method utilizes an oily matter to process an exhaust funnel, the problem thata waste gas hole is blocked in a multiple rod drawing process is effectively solved, the in-furnace impurity content is lowered, the cleanness in a furnace is improved, the monocrystal drawing periodis shortened, and the success rate of the multiple rods and the integral rod rate are increased.

Description

technical field [0001] The invention relates to a production method for improving the success rate, in particular to a production method for improving the success rate of multi-rods. Background technique [0002] At present, more than 75% of the materials for producing solar cells in this field come from silicon rods. The general production process of silicon rods is: charging → chemical materials → pulling single crystal → taking rods → stopping and cleaning the furnace, each furnace Only one crucible can be produced. After the production is completed, it is necessary to clean the furnace and replace the crucible, which consumes a long time and has low production efficiency. Under market pressure, improving production efficiency has become the only way for enterprises to participate in competition, and multi-rod production has emerged as the times require. Most manufacturers have adopted a single-repeated production process. For example, CN102345157 A discloses a solar Czoc...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C30B15/02C30B29/06
CPCC30B15/02C30B29/06
Inventor 闫广宁赵会刚张在存闫建辉董永见
Owner 宁晋松宫电子材料有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap