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  • HOME
  • ABOUT US
    • ABOUT TWS
    • FACTORY TOUR
  • SERVICES
    • PCB DESIGN
    • PCB MANUFACTURING
    • COMPONENTS PROCUREMENT
    • PCBA ASSEMBLY
    • ELECTRONICS MANUFACTURER SERVICE
    • PROJECT DEVELOPMENT
    • QUALITY INSPECTION
  • APPLICATION & PRODUCTS
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QUALITY INSPECTION

I. quality policy
Make every effort to create fine products.
Two. Quality strategy
Continuous improvement and continuous improvement of product quality (PCBA quality), each proofing, mass production will record the problems and find preventive measures, at the same time, dig deep into the quality of hidden dangers, and to prevent.
Three. Quality specification
Quality system: ISO9001:2008 quality management system.
Quality standard: IPC-610-E grade 2.
Welding standard: J-STD-001 1,2,3 grade.
Electrostatic protection standard: ESD-MIL-STD-1686
Site management system: 5S
Lead free requirements: RoHS directive
Four. Quality standard
.IPC-A-610D-G
Five, RoHS management
The company complies with the RoHS directive and supplies the products purchased by the customers to comply with the RoHS standards.
.RoHS directive prohibited substances list:
Upper limit of NO. substance name content (ppm=mg/kg)
1 lead (Pb) 0.1% (1000ppm)
2 mercury (Hg) 0.1% (1000ppm)
3 cadmium (Cd) 0.001% (100ppm)
4 six valent chromium (Cr VI+) 0.1% (1000ppm)
More than 5 brominated biphenyl (PBB) 0.1% (1000ppm)
More than 6 bromo two phenyl ether (PBDE) 0.1% (1000ppm)
7 o-phenyl two carboxylic acid two ethylhexyl ester (DEHP) 0.1% (1000ppm)
8 butylbenzoic acid two (BBP) 0.1% (1000ppm)
9 dibutyl phthalate (DBP) 0.1% (1000ppm)
10 o-phenyl two carboxylic acid two isobutyl ester (DIBP) 0.1% (1000ppm)
Six, ESD protection
Seven. Component control.
1. device selection
Customer designated brand: strictly specify the brand and material number according to the customer.
Customers do not specify the brand:
Resistance and capacitance: YAGEO
Tantalum capacitors: AVX, KEMET
Electrolytic capacitors: CAPXON, Panasonic
Film capacitors: Surong, KORCHIP
Inductors: MURATA, TDK, Sunlord
Relay: Omron, Panasonic
MOS:AOS, IR, VISHY
LED:osram, KINGBRINGHT, EVERLIGHT
Semiconductors: national, Linear Technology, NXP, Philips, Siemens, ON, ZETEX, TI, ST
SCM: ATMEL, MICROCHIP, HOLTEK
Connectors: AMP, HARWIN, HARWIN, SAMTEC, KEYSTONE, JST,
Switch: RAFI, MEC, APEN, Omron, DS
Crystal oscillator: citizen, MURATA
2. procurement strategy
Standard components, such as IC, are selected only by agents posted by official website.
Http://www.cn.nxp.com/about/sales-offices-distributors/asia-pacific/distributors.html
Firmly reject market spot, such as SEG's spot.
Standard components are small batch or urgent delivery: DigiKey, element, RS, Mouser
Non standard components, such as PCB, are selected from the top 10 suppliers in Shenzhen, such as Chong DA and Zhi en.
8 goods to ensure that the material price is reasonable.
Under customer approval and quality assurance, substitute materials are selected.
3. component inspection
Sample stage: product engineers strictly test samples according to the specification when new materials are imported.
Bulk purchase stage: IQC according to MIL-STD-105E sampling plan II level standard.
Eight, test ability: 8 AOI, 1 ICT


QUALITY INSPECTION

QUALITY INSPECTION

QUALITY INSPECTION

CONTACT INFO

Add: H building,Bao'an Zhigulnnovation and Technology Park,xixang Street,Bao'an Industrict,Shenzhen,Guangdong,China.
Tel: 086 0755-29970258
Fax: 086 0755-29667579
Email: grace@twspcb.com

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