Mar04
What Is an FPC (Flexible Printed Circuit Board)?

post on March 4, 2026
What Is an FPC (Flexible Printed Circuit Board)?
Caption: The FPC is inserted into a connector on the PCB.

At a basic level, FPCs and PCBs are very similar in both function and structure. Whether it’s an FPC or a PCB, both use copper traces on the surface—and sometimes inside the board—to carry electrical signals.

The biggest difference between them lies in the base material.

A traditional PCB uses a glass-fiber–based substrate, which makes the board hard and rigid.
An FPC, on the other hand, is mainly made from polyimide (PI) or Polyester (PET). You can think of it as something closer to thick paper: flat, thin, flexible, and bendable.

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PCB/FPC/PTF, Product Introduction     WorkingBear    Views (28)     comment (0)

Feb10
Waiver, Concession & Deviation in Electronics Manufacturing: Engineer’s Guide to Risk Checks & Self-Protection

post on February 10, 2026
The Complete Guide to Concessions, Waivers, and Waiver Letters in Electronics Manufacturing: Risk Assessments Engineers Must Do Before Signing and How to Protect Yourself
Caption: Every time I’m asked to sign a waive/concession approval, I can’t help but feel uneasy. (Boss asks you to approve a concession? How engineers protect themselves from taking the blame.)

Have you ever been in this situation? It’s late at night, you’re working overtime, and suddenly your manager drops a pile of expired components or badly out-of-spec parts on your desk and says, “The customer needs this shipped urgently—just sign a waiver and go home!” Have you ever faced that moment? And after you sign the waiver, if something goes wrong, who actually takes the blame?

Workingbear remembers when he first entered the electronics industry as a junior product or process engineer. The first time colleagues from Quality and Production asked him to “waive” a product, He just froze on the spot. He had no idea what they were talking about—and even got laughed at by the line supervisor.

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Quality, Role & Responsibility     WorkingBear    Views (692)     comment (0)
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Feb04
For Beginners: What Does SKU (Stock Keeping Unit) Really Mean in Manufacturing?

post on February 4, 2026
For Beginners: What Does SKU (Stock Keeping Unit) Really Mean in Manufacturing?
Caption: SKU is an abbreviation for Stock Keeping Unit, and it refers to the smallest unit that can be independently tracked, managed, and sold within an inventory system.

Workingbear has spent quite some time in the industry, but only recently heard the term SKU for the first time. In practice, people usually just say “SKU”. At first, Workingbear had no idea what SKU meant—not even how to spell it. Asking colleagues didn’t help either. Everyone just said they kept hearing this term from the U.S. headquarters.

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Management     WorkingBear    Views (665)     comment (0)
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Jan29
How Component Suppliers Can Break Into System Companies as a 2nd-Source Supplier

post on January 29, 2026

How Component Suppliers Can Break Into System Companies as a 2nd-Source Supplier

Many component suppliers work extremely hard to get into certain companies as approved suppliers. Playing the “pretty salesperson card” is a common tactic—while engineers may appreciate it, most of the time it still doesn’t open the door. So where does the problem really lie? And how should sales actually approach this? This article looks at the topic of becoming a 2nd-source supplier purely from an engineer’s point of view. In reality, things can be even more complicated.

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Management, Uncategorized     WorkingBear    Views (651)     comment (0)
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Jan22
How Adding a Second Source (2nd Source) Can Create a Win-Win for Cost Reduction

post on January 22, 2026

How Adding a Second Source (2nd Source) Can Create a Win-Win for Cost Reduction

As an engineer, Workingbear has to be honest—I really don’t like doing second-source qualification work. It’s time-consuming, stressful, and often thankless. If you do it well, management thinks it’s just part of your job. If it takes too long, they think you’re being difficult on purpose. And if any issue shows up later, they question your ability—“Why didn’t you catch this earlier?”

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Management     WorkingBear    Views (593)     comment (0)