In order to improve the efficiency of communication with customers, as a PCB manufacturer, Chee mau will first show process capabilities to all customers, which will help customers quickly judge whether their products can be produced.
We believe that all industries do this, and there seems to be nothing wrong with it.
However, it is easy for customers to focus on the formulation of various specifications. That is to say, when we received the first email from customers, the design values of various parameters were listed in detail: like conductor width, conductor width, copper thickness, etc., and we only need to answer whether it CAN be satisfied or NOT. Once there is something that cannot be satisfied, then the transaction will be terminated, and the customer will continue to work hard to find the next supplier.
And based on our years of experience, at this time, we are obliged to ask customers a few more questions, such as: "What is the main function of this PCB/PCBA? What is its use environment like?"
1. There is a customer who produces film products for electric heating, for which we produce FPC. This customer has only one very strict requirement, which is the copper thickness, and its tolerance is very small, which is probably the limit level of our process. After the production, we found that the qualified rate is only about 60%, all because the copper thickness is not up to standard, and the customer is not satisfied, so he said: "In this case, the DC resistance value of this FPC will not meet the requirements." After hearing this, we immediately understood that the customer adjusted the DC resistance value of the conductor through the copper thickness. In actual production, the DC resistance value of the conductor is also related to the conductor width. We can also adjust the conductor width to reduce strict requirements for copper thickness. After we communicated with customers in this way, we produced qualified products.
2. Another customer requested that the thickness of the gold plating on the pads must be very thick. After we submitted samples for few times, he proposed that a thicker thickness will be required, which made us puzzled, because in the PCB manufacturing process, the thickness of electric gold is generally difficult to achieve thicker. After inquiries, we learned that during the use of the customer's product, the pad will be directly used as a contact with the outside environment, which is a weak acid environment, so the customer wants to increase the gold thickness to enhance the corrosion resistance of the pad. So we told the customer that this would not only lead to increased manufacturing costs, but also would not significantly improve the corrosion resistance of the pads. Finally, by sealing holes in the electro-gold layer (that is, eliminating bubbles and voids in the electro-gold layer and making the electro-gold layer more compact), we not only control the product cost, but also meet customer requirements.
Therefore, dear customers, if you are asked by us about the function and use of the product next time, please don't care, we are just trying to provide you with the best solution.