How to win your orders and clients

WDF-PCB-M-31,4 layer,wonderfulpcb.com

People who order PCB and PCBA from you are in different ways and different needs. So do how you know your client? Do you know what kind of clients they are and can you make a high quote to your clients?

Firstly, you should learn to know your customers. You’d better make a category. There are several kinds of customers. One is the factory which need your boards to make electronic products. This kind of clients are good for you. Because they are indeed asking for your products. Sometimes , if the customers are from rich country, such as Europe countries and USA, then you are lucky, you can quote for a higher price because they are care more about the quality and leadtime. The other one is a distributor who is care more about the money. Everytime they make a inquiry, then they would bargain with you to get a lower price. So these clients are hard to treat well. So we need more tips to fight against them. We may quote a higher price at first and give ourselves some room to reduce the price.

Before we make a quotation to our clients, we ‘d better make a survey on our clients. We can learn more about our clients if they have a factory and what products are they produced, how many pcb they would need in a year and the most important thing is which country are they from. We need to know the situation of the country in this competitive world. In other word, we should deeply know how is our clients.

I think if one can make some analyses before we make a quotation to our clients. We can hold our own advantage and make a good relationship with our clients. There is a proverb saying so: Opportunities will always be people who are prepared.

PCB drilling

Holes through a PCB are typically drilled with small-diameter drill bits made of solid coated tungsten carbide. Coated tungsten carbide is recommended since many board materials are very abrasive and drilling must be high RPM and high feed to be cost effective. Drill bits must also remain sharp so as not to mar or tear the traces. Drilling with high-speed-steel is simply not feasible since the drill bits will dull quickly and thus tear the copper and ruin the boards. The drilling is performed by automated drilling machines with placement controlled by a drill tape or drill file. These computer-generated files are also called numerically controlled drill (NCD) files or "Excellon files". The drill file describes the location and size of each drilled hole.

Holes may be made conductive, by electroplating or inserting metal eyelets (hollow), to electrically and thermally connect board layers. Some conductive holes are intended for the insertion of through-hole-component leads. Others, typically smaller and used to connect board layers, are called vias.

When very small vias are required, drilling with mechanical bits is costly because of high rates of wear and breakage. In this case, the vias may be laser drilled—evaporated by lasers. Laser-drilled vias typically have an inferior surface finish inside the hole. These holes are called micro vias.

It is also possible with controlled-depth drilling, laser drilling, or by pre-drilling the individual sheets of the PCB before lamination, to produce holes that connect only some of the copper layers, rather than passing through the entire board. These holes are called blind vias when they connect an internal copper layer to an outer layer, or buried vias when they connect two or more internal copper layers and no outer layers.

The hole walls for boards with two or more layers can be made conductive and then electroplated with copper to form plated-through holes. These holes electrically connect the conducting layers of the PCB. For multi-layer boards, those with three layers or more, drilling typically produces a smear of the high temperature decomposition products of bonding agent in the laminate system. Before the holes can be plated through, this smear must be removed by a chemical de-smear process, or by plasma-etch. The de-smear process ensures that a good connection is made to the copper layers when the hole is plated through. On high reliability boards a process called etch-back is performed chemically with a potassium permanganate based etchant or plasma. The etch-back removes resin and the glass fibers so that the copper layers extend into the hole and as the hole is plated become integral with the deposited copper.

If you need expert PCB services, feel free to contact us at wonderful02@wonderfulpcb.com