Tag Archives: ACME PCB Assembly

Declaration of Metal Conflict-Free Metal

At Yun Industrial Co., Ltd. dba: ACME PCB Assembly, we are fully committed to ethical sourcing and responsible business practices throughout our entire supply chain. We proudly declare that all metals used in our production processes are Conflict-Free, ensuring that none of our materials contribute to human rights violations or illegal trade activities.

Our Commitment to Responsible Sourcing

ACME PCB Assembly takes a proactive approach to ensure that metals such as Gold (Au), Tungsten (W), Tantalum (Ta), Cobalt (Co), and Tin (Sn) used in our electronic assemblies are not sourced from mines or suppliers involved in conflicts within the Democratic Republic of the Congo (DRC) or neighboring regions. We conduct continuous audits, supplier verifications, and compliance assessments to ensure that all materials are obtained through legitimate and ethical trade channels.

Our team works closely with suppliers who adhere to the guidelines established by the U.S. Dodd-Frank Wall Street Reform and Consumer Protection Act (Section 1502) and the OECD Due Diligence Guidance for Responsible Supply Chains of Minerals from Conflict-Affected and High-Risk Areas.

Verified Conflict-Free Supply Chain

As a U.S.-registered company, ACME recognizes that trade routes originating directly from the DRC or transiting through Rwanda, Burundi, Uganda, Tanzania, and Kenya are classified by the United Nations Security Council as “non–conflict-free.” To maintain transparency and accountability, we ensure that none of our metal sources are connected to these regions or any non-governmental military groups.

We hereby confirm that all metals used in ACME PCB Assembly products are Democratic Republic of Congo Conflict-Free.

Quality, Integrity, and Customer Partnership

Our commitment to conflict-free sourcing reflects our broader mission—to be a trusted partner to our clients by consistently providing superior quality products, competitive pricing, and on-time delivery. As a full-service contract electronics manufacturer, we offer both Surface Mount (SMT) and Thru-Hole (PTH) assembly capabilities, supported by state-of-the-art equipment and a team dedicated to ethical, sustainable production.

By choosing ACME PCB Assembly, customers can have confidence that every board we produce meets the highest standards of quality and integrity—both technically and ethically.

Cable Harness Assembly

ACME PCB Assembly Offers Cable Harness Services

Cable Assemblies include one or more wires that run together in a single sleeve with a connector or plug on each end.  Cable assemblies could be groups of wires or cables bundled together.  They are wrapped in a thermoplastic or vinyl sleeve, cable assemblies are ideal for directing groups of wires and cables around obstacles.

Cable assemblies are designed to perform specific functions that is determined by the plugs, terminals, and connectors that are found on each end.  They are used in most electronic applications, everything from flat panel displays to the automotive electronic system to integrated cockpit systems to simple LED lighted clothing, costumes and accessories.

What Do You Use Cable Assemblies For?

Cable assemblies intersect or interconnect different circuits or electrical paths, so they work together to transmit signals or power.  They usually only have two ends to connect point A to point B.

Ethernet Cable HarnessFor example, ethernet cable assemblies are designed to provide service supporting bandwidth speeds up to 10 Gigabit Ethernet, such as large data centers, military field units, and medical facilities.  For those applications that require a lightweight, smaller assembly that can transmit clearly and rapidly over great distances, support greater bandwidths, with high voltage isolation, then fiber optic cable assemblies would meet those needs.  A few of the industries that utilize fiber optic cable assemblies, include aerospace, automotive, industrial, medical, and military applications.

Cable harnesses are more complex in nature and may require different machinery and tools to be consistent with production. Creating slits and windows in cables demand specialized equipment to handle the various conductors within the insulation.  We

Located in Carson, California, ACME PCB Assembly utilizes top of the line technology from Schleuniger to perfectly cut, strip, and process any wire or cable you need. After 25 plus years in the business, ACME PCB Assembly has the experience to be your contract manufacturer for cable & wire harness projects. As an IPC-A-610 certified assembler with a certified trainer in house, you can be rest assured the cables and wires that come out of ACME will exceed the standards.

cable assemblies, cable harness assembly, cable harness service Los Angeles, cable harness

Is Through-Hole Assembly Still Important to Use?

 

Before the 1960s, the through-hole assembly process for mounting components onto printed circuit boards was the only game in town. It was labor-intensive and required a lot of space, but it was the only option. That all changed with the rise of surface mount technology (SMT), which allows for components to be mounted directly onto a printed circuit board’s surface. Since SMT doesn’t require drilling holes through a PCB, its components are much smaller and can be mounted on each side of the board. The result is a denser, smaller PCB that can perform much better than a PCB using through-hole technology.

When SMT came on the scene, many engineers believed it would harken the death of through-hole PCBs. However, while SMT does reign supreme, through-hole is still with us today. In very specific circumstances, through-hole PCBs are a better choice than their SMT counterparts.

A Few Important Uses for Through-Hole PCBs

Through-hole PCBs may be bigger and clunkier than SMT PCBs, but they do offer up one important advantage. Through-hole components are attached far more securely than SMT, which gives them a much stronger connection between layers. SMT connections are strong enough for the vast majority of products that people use in their day-to-day lives, but for machines that must operate in extreme environments, through-hole is the more reliable and stable option.

For example, through-hole PCBs can be commonly found in machines in the military and aerospace industries. Oftentimes, these machines must survive extreme temperatures, forceful collisions, and rapid accelerations. Through-hole is the ideal reliable and resilient mounting option for these types of products.

Prototypes

The other area where you are most likely to find through-hole mounting is in product prototypes. Through-hole is often preferred in prototyping, because it is much easier to adjust and replace components as the prototype undergoes testing and design alterations. If you are dreaming up an exciting new product, you’ll want to reach out to a printed circuit board vendor that is adept at through-hole mounting. This will give you more flexibility as you put the prototype through its paces.

Find Your SMT and Through-Hole Vendor

No matter what your industry or product line, it is smart to look for a printed circuit board manufacturer with both SMT and through-hole experience. This will allow you more choice and more control over your final product. At ACME PCB Assembly, we offer extensive experience in both SMT assembly and through-hole assembly.

Contact Us Today!

ROHS-Compliant Assembly Services USA

How Being RoHS-Compliant PCB Assembly Services are Different from Assembly Services?

With everyone’s increasing concerns on the over usage of hazardous materials in the electronic and electrical products and their environmental impact, there have been several stricter regulations being imposed by the leading governmental organizations across the world. The RoHS compliance is one of those important regulations that is currently being imposed on the utilization of hazardous materials in the electronics and electrical products. Are you interested in knowing how this compliance works or what the benefits are?

Being Able to Understand the Materials that are Restricted Under RoHS Compliance

The RoHS compliance has restricted the use of six materials in the PCBs and electronic items. They include Mercury (Hg), Lead (Pb), Cadmium (Cd), Hexavalent Chromium (CrVI), polybrominated diphenyl ethers (PBDE), Polybrominated biphenyls (PBB), and phthalates such as BBP, DEHP, BBP, and DIBP.

The compliance also specifies the maximum levels of these restricted materials in the PCBs and other electronics items.

  1. Mercury (Hg): < 100 ppm
  2. Lead (Pb): < 1000 ppm
  3. Cadmium (Cd): < 100 ppm
  4. Polybrominated Biphenyls (PBB): < 1000 ppm
  5. Hexavalent Chromium: (Cr VI) < 1000 ppm
  6. Polybrominated Diphenyl Ethers (PBDE): < 1000 ppm
  7. Bis(2-Ethylhexyl) phthalate (DEHP): < 1000 ppm
  8. Dibutyl phthalate (DBP): < 1000 ppm
  9. Diisobutyl phthalate (DIBP): < 1000 ppm
  10. Benzyl butyl phthalate (BBP): < 1000 ppm

The Many Features of RoHS-Compliant Assembly Services

Many PCB assembly services are utilizing processes and technologies that help them manufacture RoHS-compliant PCB assemblies. The following are a few features that help distinguish these services from others.

  • Lead-free Surface Finishes:Many manufacturers are nowadays using lead-free surface finishes such as lead-free HASL, ENIG, Electroplated Nickel and Soft (Bondable), Hard Gold Immersion Tin (White Tin), and Organic Solderability Preservatives (OSP).
  • RoHS Compliant Substrate Materials:The choice of RoHS material depends on the requirement of the application. There are materials such as Isola IS410, and Polyclad 370HR that assure standard electrical performance; however, materials such as Isola FR415 and Polyclad Getek assure high electrical performance at low loss.
  • Primary and Secondary Services:It has been observed that many RoHS PCB assembly service providers specialized in primary and secondary services such as lead trimming, lead-free wave soldering, and many more.

Some Benefits of Using RoHS-Compliant PCBs

The benefits that are offered by lead-free and RoHS-compliant PCBs are various. The following are a few of them:

  • Helps Reduce Metal Poisoning:As the technology landscape is fast evolving, many customers are discarding their obsolete electronic equipment in landfills. Equipped with various hazardous materials, this equipment helped lead to severe poisoning. Although recycling is being performed, still the equipment may have hazardous substances in them. The RoHS directive has forced OEMs reduce their dependence on hazardous substances. This has helped reduce the impact of these materials on the environment, and people working with them.
  • Improved Product Safety:With RoHS compliance being adopted by many prominent electronics manufacturers in EU and the US, now users can be assured that the product they are using is lead and mercury free. As a result, the sales and popularity of the products from these manufacturers has tremendously increased.
  • Improved Thermal Properties:It is proven that lead-free PCBs have excellent thermal properties than their leaded counterparts. They can easily withstand temperatures between -45°C to 145°C. Nowadays, PCB manufacturers are using specialized halogen-free laminates that have further helped improve their thermal stability up to 300 °C.

The benefits of RoHS-compliant PCBs symbolize a green future.  It is important that you find a trusted RoHS-compliant assembly services provider such as Yun Industrial and ACME PCB Assembly. Our company follows processes that are audited regularly and certified as chemical free.

Call today to find out more about our RoHS-compliant assembly services. 

 

Printed Circuit Boards

What is a PCB Silkscreen on Printed Circuit Boards?

If you grew up taking apart radios, computers, or video game consoles just to see how they worked, you’ve likely studied a printed circuit board (PCB) up close. Among the intricate metallic traces and soldered components, you might have noticed small white letters, numbers, and symbols printed across the board’s surface. These markings aren’t random—they’re part of a critical layer called the PCB silkscreen.

Understanding the PCB Silkscreen Layer

The PCB silkscreen is a printed layer that provides human-readable information on a circuit board. Typically created with special inks, the silkscreen identifies important features such as:

  • Component reference designators (like R1, C5, U2)

  • Test points

  • Warning symbols

  • Company logos

  • Part numbers and date codes

  • Polarity indicators for diodes, LEDs, and capacitors

Most PCB silkscreens are printed in white ink because it contrasts clearly with the traditional green solder mask. However, silkscreen inks can also be black, red, blue, or yellow, depending on the board’s color scheme or specific customer requests.

Why Is the Silkscreen Important?

The silkscreen acts as a visual guide for anyone who assembles, repairs, or tests the PCB. It tells workers how components should be placed and identifies key features to assist in troubleshooting and maintenance. Without a clear silkscreen, identifying the purpose or placement of components could quickly become confusing, leading to costly mistakes or longer assembly times.

Additionally, the silkscreen enhances safety by marking high-voltage areas or other hazards clearly.

How Silkscreens Are Applied

Printed Circuit Board FabricationAdding the silkscreen is typically the final step in PCB fabrication, done while the boards are still panelized. The ink used must be carefully chosen to withstand the chemicals and heat involved in soldering and assembly. Once printed, the board moves to the final finishing or routing phase.

There are several methods for applying a silkscreen:

  • Manual Screen Printing: Traditional, cost-effective for low-volume runs

  • Liquid Photo Imaging (LPI): Offers higher precision for dense, complex boards

  • Direct Legend Printing (DLP): Uses inkjet printers for extremely accurate and fast printing

Each method is selected based on the PCB’s design complexity, production volume, and budget.

Common Mistakes to Avoid in Silkscreen Design

Even experienced PCB designers can make mistakes when preparing the silkscreen layer. Some key things to watch out for:

  • Avoid printing over pads: Silkscreen ink can interfere with soldering and create defects.

  • Keep text legible: Fonts should be large enough to read easily, even after solder mask application.

  • Allow for registration tolerance: Slight shifts during manufacturing mean text and symbols should have enough spacing to stay clear and readable.

A well-designed silkscreen makes the PCB easier to work with and improves overall product quality.

Turnkey Yun IndustrialTrust ACME PCB for Quality PCB Manufacturing

At ACME PCB, we take pride in handling every detail of your PCB project—including the silkscreen layer. Our team ensures that every marking is clear, correct, and perfectly aligned, giving you boards that are not only functional but also easier to assemble, maintain, and troubleshoot.

Need a reliable PCB manufacturer that gets the details right? Contact ACME PCB today to get started!