BICHENG ENTERPRISE LIMITED

High Frequency PCB | Metal Core PCB | Flexible PCB

RO4350B / 4003C | RT/duroid 5880/ 5870 | RF-35TC / TLY-5

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Flexible PCBs | Thin PCBs | Polyimide PCBs | Single Sided FPC

Customer Reviews
Kevin, Received and tested the boards - thanks very much. These are perfect, exactly what we needed. rgds Rich

—— Rich Rickett

Ruth, I got the PCB today, and they are just perfect. Please stay a little patience, my next order is coming soon. Kind regards from Hamburg Olaf

—— Olaf Kühnhold

Hi Natalie. It was perfect, I attach some pictures for your reference. And I send you next 2 projects to budget. Thanks a lot again

—— Seba T.

Kevin, Thanks, they were perfectly made, and work well. As promised, here are the links for my latest project, using the PCBs you manufactured for me:

—— Daniel F

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Flexible PCB

  • High Precision Flexible PCB suppliers
  • High Precision Flexible PCB suppliers
  • High Precision Flexible PCB suppliers
  • High Precision Flexible PCB suppliers
  • High Precision Flexible PCB suppliers

General Profile

A breakdown of a flexible circuit shows that it consists of 3 basic elements: copper foil, dielectric material and adhesive. Most of the manufacturing proceses, i.e. imaging transfer, plating and etching , are quite similar to those used when producing plated-through boards. However, there're differences due to the thin and floppy material used in flexible circuits.

 

Purpose of Flexible Circuits

1) To provide interconnections between printed circuit boards and other components.

2) To serve as three-dimensional substrates for the mounting of SMT components, e.g., in

photographic and video cameras.

3) To establish interconnections capable of withstanding dynamic flexing.

4) To form part of rigid-flex circuit boards.

 

Advantages

1) Flexibility

2) Volume decreases

3) Weight reduces

4) Consistency of SMD mounting

5) Reliability increases

6) Controllability of electrical design of parameters

7) Tin soldered overall on the FPC end

8) Material optional (PI, PET)

9) Low cost

10) Continuity of processing

 

Applications

Thin-film switch, capacitive touch screen / panel, keypad FPC, laser head FPC,

General purpose LED soft light strip, mobile phone built-in antenna FPC Touch screen,

Telephone receiver / earphone FPC, contact belt of inkjet printer, Toy lamp strip,

LCD module, instrument panel, flexible flat cable, display backlight etc.

 

Flex PCB Capability

No. Specifications Capabilities
1 Board Type Single layer, Doulbe layer, Multilayer, Rigid-Flex
2 Base Material PI, PET
3 Copper Weight 0.5oz, 1oz, 2oz
4 LED Maximum Size 250 x 5000mm
5 General Maximum Size 250 x 2000mm
6 Board Thickness 0.03mm-3.0mm
7 Thickness Tolerance ±0.03mm
8 Mininum Drill Hole 0.05mm
9 Maximum Drill Hole 6.5mm
10 Tolerance of Drill Hole ±0.025mm
11 Thickness of Hole Wall ≧ 8 um
12 Minimum Track/Gap of Single Layer Board 0.025/0.03mm
13 Minimum Track/Gap of Double Layer and Multilayer Board 0.03/0.040mm
14 Etching Tolerance ±0.02mm
15 Minimum Width of Silk Legend ≧ 0.125mm
16 Minimum Heigh of Silk Legend ≧0.75mm
17 Distance from Legend to Pad ≧0.15mm
18 Distance from Opening Solder Mask of Drill Coverlay to Track ≧0.03mm
19 Distance from Opening Solder Mask of Punching Coverlay to Track ≧0.03mm
20 Thickness of Immersion Nickel 100-300u"
21 Thickness of Immersion Gold 1-3u"
22 Thicnkess of Immersion Tin 150-400u"
23 Minimum Electrical Testing Pad 0.2mm
24 Minimum Tolerance of Outline(Normal Steel Mould Punch) ±0.1mm
25 Minimum Tolerance of Outline (Precision Steel Mould Punch) ±0.05mm
26 Mininum Radius of Bevel Angle (Outline) 0.2mm
27 Stiffner Material PI, FR-4, 3M Adhesive, PET, Steel Sheet
28 RoHs Yes
29 Solder Mask Colour Yellow, White, Black, Green

Flexible PCB Sample Introduction

Flexible PCBs | Thin PCBs | Polyimide PCBs | Single Sided FPC

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Product Details:

Place of Origin: China
Brand Name: Bicheng Enterprise
Certification: UL
Model Number: BIC-0263-V2.63

Payment & Shipping Terms:

Minimum Order Quantity: 1
Price: USD 2.99-6.99 PER PIECE
Packaging Details: Vacuum
Delivery Time: 5-6 working days
Payment Terms: T/T, Western Union
Supply Ability: 45000 pieces per month
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Detailed Product Description
Number Of Layers: 1 Glass Epoxy:: Polyimide (PI) 25um
Final Foil: 1 Oz Final Height Of PCB:: 0.20 Mm ±10%
Surface Finish: Immersion Gold Solder Mask Color:: Yellow
Colour Of Component Legend: White Test: 100% Electrical Test Prior Shipment

Structure of FPC
According to the number of layers of conductive copper foil, FPC can be divided into single layer circuit, double layer circuit, multi-layer circuit, double sided and so on.

Single-layer structure: the flexible circuit of this structure is the simplest structure of the flexible PCB. Usually the base material (dielectric substrates) + transparent rubber(adhesive) + copper foil is a set of purchased raw materials(semi-manufactures), the protective film and transparent glue are another kind of bought raw material. First, copper foil must be etched to obtain the required circuit, and the protective film should be drilled to reveal the corresponding pad. After cleaning, the two are combined by rolling. Then the exposed part of the pad electroplated gold or tin to protect. In this way, the big panel board will be ready. Generally also it’s stamped into the corresponding shape of the small circuit board. There is also no protective film directly on the copper foil, but printed resistance soldering coating, so that the cost will be lower, but the mechanical strength of the circuit board will become worse. Unless the strength requirement is not high and the price needs to be as low as possible, it is best to apply the protective film method.

Double layer structure: when the circuit is too complex to be wired, or copper foil is needed to shield the ground, it is necessary to choose a double layer or even a multilayer. The most typical difference between a multilayer and a single plate is the addition of a perforated structure to connect the layers of copper foil. The first process of transparent rubber + base material + copper foil is to make holes. Drill holes in the base material and copper foil first, clean and then plated with a certain thickness of copper. The subsequent fabrication process is almost the same as the single-layer circuit.

Double sided structure: both sides of the double sided FPC have pads, mainly used to connect other circuit boards. Although it and monolayer structure is similar, but the manufacturing process is very different. Its raw material is copper foil, protective film and transparent glue. The protective film should be drilled according to the position of the pad first, then the copper foil should be affixed, the pad and track lines should be etched and then the protective film of another drilled hole should be affixed.

Copper foil is available in two different types of copper: ED Copper and RA copper.
ED copper is an electro-deposited (ED) copper foil produced in the same way as the copper foil used for rigid printed circuit boards. This also means that the copper is “treated”, i.e., it has a slightly rough surface on one side, which ensures a better adhesion when the copper foil is bonded to the base material.
RA copper is a rolled and annealed copper foil produced from electrolytically deposited cathode copper, which is melted and cast into ingots. The ingots are first hot-rolled to a certain size and milled on all surfaces. The copper is then cold-rolled and annealed, until the desired thickness is obtained.
Copper foil is available in thickness of 12, 18, 35 and 70 μm.

The most common available for dielectric substrate and coverlay is polyimide films. This material can also be used as coverlay. Polyimide is best suited for flexible circuits because of its characteristics as stated below:
High temperature resistance allows soldering operations without damaging the flexible circuits
Very good electrical properties
Good chemical resistance
Polyimide is available in thicknesses of 12.5, 20, 25 and 50 μm.

Base laminates for rigid printed circuit boards are copper foils laminated together with the base materials, the adhesive coming from the prepreg material during lamination. Contrary to this is the flexible circuit where the lamination of the copper foil to the film material is achieved by means of an adhesive system. It is necessary to distinguish between two main systems of adhesive, namely thermoplastic and thermoset adhesives. The choice is dictated partly by the processing, and partly by the application of the finished flexible circuit.

 

FPC Case: Flexible PCBs | Thin PCBs | Polyimide PCBs | Single Sided FPC
(FPC’s are custom-made products, the picture and parameters shown are just for reference)


General description
This is a type of single layer flexible printed circuit for the application of Wireless Dongle, 0.2mm thick. The base laminate is from ITEQ, It’s fabricated per IPC 6012 Class 2 using supplied Gerber data. Polyimide stiffener is applied on the inserting head.


Parameter and data sheet

Size of Flexible PCB 230.5 X 40.8mm
Number of Layers 1
Board Type Flexible PCB
Board Thickness 0.20mm
Board Material Polyimide (PI) 25µm
Board Material Supplier ITEQ
Tg Value of Board Material 60℃
 
PTH Cu thickness ≥20 µm
Inner Iayer Cu thicknes N/A
Surface Cu thickness 35µm (1oz)
 
Coverlay Colour Yellow
Number of Coverlay 1
Thickness of Coverlay 25 µm
Stiffener Material Polyimide
Stiffener Thickness 0.2mm
 
Type of Silkscreen Ink IJR-4000 MW300
Supplier of Silkscreen TAIYO
Color of Silkscreen White
Number of Silkscreen 1
 
Peeling test of Coverlay No peelable
Legend Adhesion 3M 90℃ No peeling after Min. 3 times test
 
Surface Finish Immersion Gold
Thickness of Nickle/Gold Au: 0.03µm(Min.); Ni 2-4µm
RoHS Required Yes
Famability 94-V0
 
Thermal Shock Test Pass, -25℃±125℃, 1000 cycles.
Thermal Stress Pass, 300±5℃,10 seconds, 3 cycles. No delamination, no blistering.
Function 100% Pass electrical test
Workmanship Compliance with IPC-A-600H & IPC-6013C Class 2

 

 

Features and benefits
Excellent flexibility
Reducing the volume
Weight reduction
Consistency of assembly
Increased reliability
Controllability of electrical parameter design
The end can be whole soldered
Material optionality
Low cost
Continuity of processing
Focus on low to medium volume production
More than 15 years of experience

 

Application
Mobile phone built-in antenna FPC, flex keyboard for mobile phone keys, Industrial control computer soft board

 

 


Why choose us?
1) Focus on your core competencies: We’ve deeply known it is full of fierce competition for our customers in the market. You can focus on such important competencies as research and development, sales and marketing based on our professional performance and skilled services that exceeding your expectation.

2) Cutting-edge technology: it is rational for a small and medium-sized customer to hanker after the latest equipment and manufacturing expertise for its PCBs. By the partnerships
with Bicheng PCB, you gain access to reach your expectation with our 3 factory bases with over 26,000 square meters.

4) Save the cost of production: Production cost is one of the key points of our customers’ product competitiveness. Bicheng PCB have been striving to reduce its manufacturing cost from equipment introduce, worker training and technology improvement to increase their profitability. Customers are satisfied with our cost savings but without quality loss.

5) Avoid hassle: It’s an upset matter when quality problem hassling you. Bicheng engineering design prevents problem from occurring in pre-production. You will not get headache with Bicheng prototypes, small orders and volume production. Our rate of customer complaint is less than 1% and will be solved satisfactory.

6) Save time: Market requires the products updating quickly. Bicheng PCB always works fast and flexible to save the time of production from prototype to standard production,
quick turn-around or scheduled deliveries.

7) An excellent team: Bicheng is trustworthy partner with passion, discipline, responsibility and honesty. We have a team of experienced sales persons and skilled customer services. Do not change your supplier. If change is must, Bicheng is the right one for you.

 

 

Flexible PCBs | Thin PCBs | Polyimide PCBs | Single Sided FPC

 

Flexible PCBs | Thin PCBs | Polyimide PCBs | Single Sided FPC

 

 

 

Contact Details
BICHENG ENTERPRISE LIMITED

Contact Person: Ms. Bonnie Shi

Tel: 86-755-27374946

Fax: 86-755-27374947

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