Questions tagged [ipc]

IPC, the Association Connecting Electronics Industries, is a trade association whose aim is to standardize the assembly and production requirements of electronic equipment and assemblies.

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81 views

How can I set clearance based on IPC-2221?

Below are two pictures. The first picture is from IPC-2221. I made the second picture. Which categories do the L1, L2, L3 and L4 clearances in the second picture belong to in the first picture at 310 ...
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41 views

IPC standards to ask manufacturer to assure a PCBA is correctly manufactured?

I'm preparing all the documentation to send to my PCBA manufacturing supplier and I wonder if there's a list of IPC standards to include in this documentation and verify they are compliant to them and ...
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60 views

If a PCB is inspected to an IPC-A-600 class higher than specified what are the negative impacts?

I have received several parts from a PCB manufacturer which should have been inspected to IPC-A-600 Class 2 but were instead inspected to IPC-A-600 Class 3. I believe I have received PCBs inspected to ...
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91 views

IPC-B-25A Test board schematic

I need to design IPC-B-25A IPC multipurpose test board. I have only following board image. Board features are below:- Solder Mask - None FR4 Tg=175°C Size - 4"x4.5" (10x11.4cm) Thickness 0....
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1answer
93 views

Do Professional Manufacturers Violate IPC Standards?

I lay out simple boards using BGA packages and often ignore my EDA tool's courtyards. I know these courtyards are set by IPC standards to allow for good design, but then I look at boards like the ...
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145 views

Intertrack spacing and decoupling cap package for high voltage buck regulator

We're routing a PCB for a LM5085 buck controller of 8 pin WSON package with a maximum input of 75V. My questions are for the relatively high input voltage 0603 is the smallest input decoupling cap I ...
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2answers
174 views

PCB trace height to width ratio

I came across the Isola IsoStack website that lets me test PCB stack-up using Isola substrates: https://www.isola-group.com/isostack My project is using a stripline design with a 1oz copper inner ...
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0answers
46 views

Which standard is used to inspect stranded cables secured to PCBA with RTV?

Does some one know what standard can be use for quality inspection on a PCBA that have stranded wires soldered and fixed with RTV? I check the IPC-A-610 Rev E and the most similar criteria, is in the ...
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1answer
83 views

How in-depth is the IPC "Introduction to Printed Circuit Design" course?

I'm looking into courses to progress from autodidactic hobby-level PCB design. IPC is offering an "Introduction to PCB design" course. How well does the course cover the standards? IPC-222x, IPC-7x51,...
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88 views

IPC7351-B confused with mils and mm

We have started to incorporate the IPC7351B standard in our design. We use mils for our layouts. For Example consider part RC0603JR-070RL. As per IPC7351B, In mm RESC1607X60N and in mils ...
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1answer
823 views

Which IPC standard we should follow?

Our PCB designing team is of 5 members and we want to incorporate IPC standards in our designs from now on. We deal with a single-sided layer to 18 layers of PCB. We are into digital, analog, RF and ...
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129 views

Altium IPC Footprint wizard Generating Dodgy Components

I've started using Altium Designer 14 after a break and needed to build some components I started with a EP4CE10 FPGA, but I noticed that despite following the component guidelines as close as ...
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93 views

Reflow soldering, pin longer than pad?

I was designing the footprint for this FPC connector: Datasheet The recommended land pattern is shown here: The issue I encountered is that the pins on one side protrude outside of the pad: I ...
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2answers
1k views

‘One for all’ standardized land pattern v.s. specified land pattern in datasheet

I’ve designed lot of ‘simple’ PCBs for hobby and proof-of-concept purposes, but never for (mass)manufacturing. In order to do so in the future, and further expanding my design skills and knowledge, I’...
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2answers
497 views

High Voltage Capacitor Lead Clearance

I am designing a high voltage board, 10,000 VDC. I wish to use a suitably rated capacitor such as the DHR4E4A102K2BB. When I have been studying the ...
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2answers
154 views

Surface Mount package standards guide?

Is there a universal guide-line for the mechanical dimensions and tolerances of Surface Mount packages across the industry? I'm very new to SMT machine programming (<1 year), so I've been trying ...
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1answer
629 views

Do I need to supply IPC documents to PCB fab house?

I would like to have a PCB design manufactured and plated with an ENEPIG finish. I have found a fab house that states they can perform ENEPIG finish and their site lists the plating option as one that ...
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2answers
671 views

PTH drill diameter do the IPC take the pin distance in account?

I wonder if the IPC take the Pin distance tolerance in account for the drill diameter? (see p in pic). I can't find any guidelines for it anywhere. Or is it just so that it's implicitly,common sense ...
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2answers
972 views

SOT23-3 Pin out: IPC or Datasheet?

IPC-7351 gives a pin out and a 0 degree rotation for SOT23-3 packages; but, IC vendors use many different pin numberings. When I make my library component should I use the IPC pin numbering for all ...
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3k views

Why do KiCad's library footprints for 0402 resistors and capacitors have different pad sizes? [duplicate]

KiCad's default library footprint for C_0402 is longer than R_0402. Why?
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3answers
4k views

IPC Specification for pad width vs. pin width (SMD)

I am working on a board that has a fine-pitch component (0.35mm). Each pin is 0.15mm wide. I received a question from the manufacturer asking if they could adjust the pad width from 0.22mm to 0.18mm +/...
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149 views

Angle of wiring

I´m relativ new to PCB designing and therefore I have two questions. I started to design a simple 1-Layer PCB with a circular shape. In the Internet I found that a wire must not be "too long" ...
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2answers
4k views

Which IPC standard provides land pattern dimensions?

This answer says it's IPC-7351, but I'm not seeing anything about land pattern dimensions in the table of contents. I'm wanting to make footprints in Altium and I found the IPC Compliant Footprint ...
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1answer
4k views

Definitive land pattern for 0603 SMD capacitors?

So, I am trying to figure out what pad size to use for 0603 (imperial) SMD capacitors. The datasheet for the particular capacitors I plan to use provides part dimensions but does not recommend a land ...
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8k views

Why there is IPC Level A and B?

Why there are IPC footprint Levels A and B? I believe it has to do with the standard related to tape and reel feeding, but I will appreciate a more elaborated answer.