The reason for the problem of development is not clean and has Residual glue in FPC?

How to deal with these situation?

  1.  How to deal with these situation?There have glue mark and greasy dirt on the boards in prepared processing stage, it need to clean the plate thoroughly.
  2. The temperature is too high and time is too long in the stage of Pre-heating, so it need to control the temperature of the pre-drier, adjust it on normal temperature and strengthen the control of time.
  3. The exposure energy is too high on the stage of exposure, or the shading rate is poor of the base boards.
  4. The developing liquid’s concentration and the temperature are too low, so it need to check the concentration and adjust the temperature to normal timing.

FPC Typical Production Process

FPC Typical Production Process

Cutting -> NC Drilling -> Black Holes/Cu Plating -> D/F Lamination -> LDI Exposure ->Develop/Etch/Stripping -> Automatic Optical -> CVL Lay UP -> CVL Lamination -> Hole Punching -> Surface Treatment -> Screen Printing -> Open/Short Testing -> Adhere Stiffener -> Outline Punching -> Final Inspection

FPC Typical production process flow chat

FPC Typical production process flow chat

 Meanwhile we also can visit our website for single side Flexible PCB,dual access Flexible PCB,double side Flexible PCB or flex rigid PCB.

Differences between Roll Anneal Copper Foil and Electrolysis Deposition Copper Foil

Differences between Roll Anneal Copper Foil and Electrolysis Deposition Copper Foil

Roll Anneal Copper Foil (RA copper):

Formation: Roll copper block many times, and then do the annealing treatment with high temperature. The shape of its crystal is lamellar structure.
Advantage: Soft, smooth surface, suitable for flexible PCB and small lines.
Shortage: high cost

Electrolysis Deposition Copper Foil (ED copper):

Formation: Melt copper into dilute sulfuric acid, it becomes bluestone solution.
Through a high electric field, copper attach on the metal drum. With the rolling of metal drum, thin copper foil finally formed.

Advantage: Low cost
Shortage: Unsuitable for small lines; bad bending resistance.
Here is the cross section observation of RA Copper and ED Copper:

roll anneal copper foil and electrolysis deposition copper foil

Join US-Best Technology Co, Limited

As Best Tech get older and bigger,more worker and staff are needed,but we would better to employ worker who work in production line from China.For the staff in salesDepartment,we also would like to get some colleagues from worldwide,so now pls see the information as below to know who we would like:

Sales Manager:

  • Three years above experience in sale,2 years experience in Director of the ministry of foreign trade. Experienced with PCB or electronic is prefered.
  • Develop customers independently, customer management and Excellent customer analysis and business negotiation skills.
  • Manage Foreign trade team and Lead the group to complete performance targets.
  • College degree or above,CET-6 or above(For Chinese)
  • Fluent English:Can communicate with foreign session skilled, face to face to carry out business activities.

Salesman:

  • Responsible For Developing Customers
  • Maintain old customers
  • Search and find new customers from Google,B2B and yellow page,etc
  • Communicate with customers by telephone and email. Good business letter writing skills or the strong basic professional knowledge required meanwhile excellent verbal is required to be able to talk with customers by telephone and face to face without any problem
  • One year above working experience. Professional and academic: Business English, international trade,Marketing,etc, college degree or above; Secondary students will be fine if outstanding ability.
  • Ladies First,age:18~35; Excellent fresh graduate can also be considered
  • Experience in PCB/FPC sales or Understanding PCB production process will be better
  • No required for the experience in L/C, Trade documents and shipping management.Our payment is T/T and Net 30 days.

Company information:

  • Name:Best Technology Co, Limited
  • Address:Working place: 9E, Jindacheng Building, Center Rd(CBD of ShaJing), Shajing Town, Bao’an District, Shenzhen,China
  • Working Time:Monday ~Friday:08:30~12:00a.m,14:00~18:00 p.m; Saturday:09:00~12:00a.m;
  • Benefits:High basic salary+ push money+ year end bonus+ Full Attendance Award(High to 6200 Yuan/year);in-house and off-site training;Development :salesman- Supervisor -manager-director- vice president;International or Domestic Travel Incentives;free dinner and have lunch with boss + afternoon tea: Snacks and fruits;Free 1-layer check-up;Spring Festival transportation costs for Expenses(For Chinese);Paid annual leave:5 days for working than one year,and increasing every year;Sports fitness leisure activities every week, every month large group activities (camping, the beach barbecue), enterprise Internet activities every quarter, 1 ~ 2 times a year to expand training;Provide free accommodation;
  • Products:Flexible PCB,single sided FPCB,Dual access FPC,Muliple FPCB,Rigid Flex PCBand so on.

You can visit our website for more information or send your resume into info@bestfpc.com,also send us your email if you would like to know more.