Questions tagged [fpc]

Questions regarding Flexible Printed Circuits. This is opposed to standard PCBs made of solid copper clad boards.

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35 views

FPC Connector type for Echo Dot 2nd gen

currently i'm trying to interface Alexa LED/Microphone board with Raspberry pi. The big Alexa (1 Gen) has a 0.5mm pitch - I got an 0.1" adapter for this and it's working. Now I'd like to do the same ...
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1answer
41 views

Pitch of FPC connector

I need to interface a display which has an FPC connector. I'm a bit confused as to what is the pin pitch. The datasheet's drawing is a bit confusing because the dimension lines are a bit off-centered ...
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2answers
45 views

How to connect multiple ground pins in a FFC connector

So I have a bunch of these FFC connectors shown here, and a lot of the middle pins are actually ground pins (highlighted in green). I have a multi-layer board, so I want to route all these grounds to ...
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25 views

Splitting Nomex FPC Jumpers

I have been splitting PTFE FPC jumpers using an Exacto knife and that works fine, but the Nomex FPC connectors are cheaper. The PTFE is a tough, but pliable, homogeneous material so cuts just fine ...
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1answer
41 views

Save My Camera! (FPC Breakout?) [closed]

I recently took apart my camera to solder some wires onto the take video button so I could trigger taking videos remotely. The button for this was housed inside a plastic housing and all I could find ...
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1answer
76 views

What is a “mechanical pad”?

I've bought an FPC breakout stick from: Adafruit. In its datasheet, it mentions a "mechanical pad", which is the exposed copper bar near the connection pads. What does it do, and can I utilize it ...
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0answers
59 views

EMI filtering on multi-FFC assembly

an aspiring electronics engineer here. I do some electronics design for work and I'd like to know the following: If I have an assembly of a main board, to which an FFC cable connects into a second ...
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1answer
177 views

How do I design my own FFC cable

I need to design a custom FFC cable for an electronic device (about 10cm and 34pins) I messaged a manufacturer who could make custom ffc but he needs a layout or something and I don't have experience ...
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0answers
39 views

Are FPCs or FFCs more resilient to bending/creasing multiple times (~180 degrees)

My company is designing a product that requires a flexible cable. The cable design is almost exactly the same as a headphone cable as seen here I'm concerned that inevitably some idiot will try to ...
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1answer
81 views

Signal placement in flat ribbon cable, FPC or FFC with digital and power signals

I want to interface different boards with FPC/FFC or ribbon cable and I was wondering about the placement of the signals in the cable. I plan to have a 39 signals FPC with : 1 SPI bus (SCK, MOSI, ...
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1answer
42 views

Stagger Traces in a Flex Circuit?

I am designing a connector to PCB interface using a flex-circuit. Stackup is R-F775 2-layers with plated thru-holes and stiffeners (though the area in question has only traces). I'm wondering if it ...
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1answer
69 views

Extend smartphone camera outside the device

For a project, I would like to move the camera of a smartphone (Honor 7 in my case) ouside of the device by an extension of some sort. I have determined that the connectors have a pitch of 0.4mm. The ...
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2answers
121 views

Options for permanently joining two flexible printed circuits (FPC) together?

Robust, simple and cheap method to join a pair of flex pcbs / flex printed circuits (fpc) together? One option could be making both circuits rigid-flex then joining as one would two pcbs, which would ...
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1answer
424 views

FPC cable contacts. Bottom vs Top and Bottom

I would like to design custom FPC cables as extensions of my flex pcb that will connect to this connector of another PCB. My question is about the Connector/Contact type. In the digikey page it ...
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4answers
2k views

Understanding the Maximum Speed that can be Transmitted over a Cable

I am trying to source a FFC/FPC cable for USB3.0 (+5gbps). This brought me to the question of signal transmission. I'm somewhat of a beginner in this topic. I know that you should match impedance on ...
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1answer
161 views

Crimp and Solder connectors for flexible electronic

I am desperately looking for crimped connectors compatible with flexible PCB and devices such as the one depicted in the following figure : This is a pressure sensor based on a piezoelectric polymer. ...
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1answer
89 views

Nexus 6P FPC connector

What is the importance of this metal edge of my Nexus 6P fpc connector? I broke one of the two, would anything be affected? Is there a name for this piece?
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0answers
36 views

FPC Connector on a Laser Distance Module

I recently purchased some RS232 laser distance modules from overseas and I'm just in the process of trying to get them going. Basically it takes 4 I/O's - Ground, + 3VDC, TX, RX. It has an 8 way FPC ...
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0answers
243 views

Flex circuit solid or hatch copper pour

I have a flex circuit board with 5 LEDs mounted on it. I have large copper areas attached to the LEDs for improved heat dissipation. I read here that "With a hatched plane, the moisture can exit the ...
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2answers
171 views

Purpose of black overlay in flex circuit design

Does anyone know the purpose of the black overlay I see applied to flexible circuits inside phones? This is inside the S7, I see the same thing in the iphone. It's clearly been applied on top of the ...
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0answers
103 views

Selecting FPC connector for LCD

The flexible flat cable of the LCD i want to use has these odd ground pads in the ends that i have not seen before. How is this handled in practise, does it turn the otherwise 37 pin connector into a ...
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1answer
407 views

How do I open this FPC connector?

I struggle to remove the FPC from this connector. I could not find anything like that in this digi list, and I am afraid to damage it. The connector is 15mm wide and I have found it in an Olympus PEN ...
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1answer
113 views

Who makes polyimide stiffeners for FPCs?

I have an FPC that is 0.075mm thick and I am trying to find a FPC zero insertion force connector to fit it. The smallest FPC connector I can find on Mouser or Digikey accepts FPC thickness down to 0....
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1answer
600 views

Need help finding the right FFC connector

This is my first time working with FFC/FPC. I'm looking for a FFC/FPC connector to match this Micro SD card extender, just like shown on the PCB. According to the dimensions diagram the pitch seems ...
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1answer
428 views

Altium: STEP File of Board with Multiple Layer Stacks Exports Incorrectly

I have been having this issue for some time and have not yet figured out whether it is a user error or an Altium bug. I have a PCB design with two layer stackups: In the Altium 3D view it looks good....
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1answer
268 views

I'm looking for this FPC connector [closed]

I'm looking for this board, but I don't know the correct name: Anyone knows the name?
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3answers
670 views

Soldering to PCB edge connector coated for FPC contact

Figure 1. (1) Lenovo keyboard controller (upside down), (2) keyboard membrane lower layer and (3) upper layer. The spacer layer is just about visible around the contact dots. I'm building a ...
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3answers
2k views

What's the purpose of traces that are later punched out?

I've found this odd feature on an FPC in a Camera than handles button and switch input. You can see there are traces that look like they were once connected and later punched out to be cut. The one ...
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1answer
227 views

FPC connector to DIP

I have a board which is something like this: (available on eBay) I know I have to buy a socket, but how do I solder the connector onto the board?
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3answers
961 views

How to manufacture cheap custom flexible circuit boards? (strips)

Let's suppose I need two long series of IR emitters and receivers to detect position of people along a hallway (corridor). I would use surface mount components to make the sensors less noticeable, and ...
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1answer
1k views

PCB footprint recommendations for FPC soldering

I'm considering making a PCB to which I would directly solder an OLED display like this; it has a 30-pin, 0.7 mm-pitch FPC connector (a link to the datasheet is on the page). What's the right way to ...
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1answer
2k views

Slide lock or flip lock for FPC connector?

I'm looking at different connectors for for an FPC cable, and I've narrowed it down to two nearly identical connectors, whose only difference in the lock. One uses a "slide lock": While the other ...
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2answers
2k views

What connector for this cable?

I am working on a part of a project for a university exam and it includes an interface with a touch screen. The touch screen is a classic resistive four wire, it comes with a display of course. ...
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1answer
329 views

Is it ok to bend a VIA in a Flex Printed Circuit?

On a Flex Printed Circuit (FPC) made out of Kapton polyimide, will anything bad happen if I put a VIA in a part of the FPC that has to bend? VIA size: 0.2 mm hole diameter in 0.4 mm copper diameter ...
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2answers
1k views

What are standard design rules for a Flex Printed Circuit (FPC)?

For an FPC made out of Kapton (polyimide), what are the: min trace width min trace-trace separation min distance from a trace to the edge of the FPC min drill hole diameter min distance from a drill ...
7
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1answer
350 views

Solder Mask on fPCB starting to degrade

I have a flex-PCB that is acting as a sensor bus for one of my projects. I started getting some wonky readings from one of the sensors, but I found that if I removed the sensor from the bus (with ...
11
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3answers
3k views

Flexible-PCBs: what data is needed for manufacturers?

Can someone explain more about how you generate data for flexible or flexi-rigid PCBs for manufacture? Do I just make more layers and export more gerber files? Is there anything I need to keep in mind ...
6
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3answers
692 views

Flexible Watch Circuit Parts

I'm working on a project to make a wristwatch similar to this one: Now I have the ability to make flexible PCBs since I accidentally bought some crazy thin copper clad. I obviously want to use SMD ...