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Recommendations For Outsourcing PCB Assembly And Sample Producing
Buying high-priced production machines isn't practical if you simply wish to run the PCB manufacturing and assembly of several prototypes. As an alternative you most likely wish to subcontract the prototype assembly to a dependable contract producer. I am going to help you find a suitable vendor and give some guidelines as to what to look out for when choosing a vendor.
Frequently you will find a quote system on contract manufacturer websites. Using this system, you can get an immediate quotation for your board or assembly. This will help you save time when evaluating different vendors. You should be able to enter all of the board information such as board thickness, material etc. and special requirements such as milling, surface treatments into the quote system. This will make certain an accurate quote without the danger of surcharges later on.
If you produce a small volume of boards, the cost customarily will be higher per board than the cost when manufacturing a larger quantity. This is a result of the board production and assembly setup expense which is typically fixed. A number of vendors will employ a system where they combine boards from a number of customers. Using this method the setup expense will be distributed among a number of clients. When you produce a product, you obviously do not wish to have to manufacture a high quantity of boards straight away while you refine your design.
One limiting factor with small-quantity prototypes however is that the choice of materials and material thicknesses will be restricted. If you are utilizing a particular material then chances are there won’t be any other customers utilizing the same material. Many vendors will charge differently based on how quick you need them to finish the production. A longer lead time will afford the vendor more flexibility to slot the assembly. In addition, they can more easily mix your order with other customer's orders. This is generally reflected in lower costs which you will see in the quote section. Clearly if you are in a hurry and want to be moved to the top of the pile you will need to spend more money.
Ensure that your supplier can read your production files which generally would be Gerber files for circuit boards but can also be software-specific files in some cases. A number of suppliers also offer in-house PCB design. Even if you design your board yourself, picking a vendor with design services may prove useful in case there is a problem with your files. In this situation your supplier can make quick changes which will eliminate expensive delays.
Be sure that your supplier can handle the package type of each component on your board if you plan on subcontracting the PCB assembly. You should get a list of what types of components your vendor can mount online. Some manufacturers may not be capable to mount special BGA or chip-scale packages. It is best to contact your vendor ahead of time to eliminate problems down the road.
If you wish to simplify the purchasing of board components, you can choose a manufacturer which has stock of standard parts. That way you only have to consign special types of components. Be sure to specify which components you wish to deliver yourself when you upload your bill of materials.
Most vendors will also offer manufacture of the SMT stencil which is needed for PCB assembly. Make sure to buy the stencil immediately when ordering the circuit boards themselves to eliminate delays.
If you need testing, make sure your vendor supports the board test methods you need. Some testing will require building of special test equipment. This will require additional time and cost. In addition, be certain that your manufacturer has appropriate quality management approvals.
Do phone manufactures test the quality and durability of their phones?
I wonder if phone manufactures test how their phones hold up after being dropped, after the buttons are dialed so many times, after they get dirty and cleaned again and again...
The laboratories which supply all the phone sets in the US have extensive testing of the product ad infinitum( forever). Every single element which goes into making a phone is tested long before the product is marketed and must meet whatever standards they establish as acceptable. Answer your own question. How often has any element in your home phone(s) failed?
Bristly particles could be boon for powerplants (MIT)
Sometimes, a simple decision to try something unconventional can lead to a
significant discovery.
A well-known method of making heat sinks for electronic devices is a process
called sintering, in which powdered metal is formed into a desired shape and
then heated in a vacuum to bind the particles together. But in a recent
experiment, some students tried sintering copper particles in air and got a
big surprise.
Instead of the expected solid metal shape, what they found was a mass of
particles that had grown long whiskers of oxidized copper. “It was sort of
serendipitous,” says Kripa Varanasi, d’Arbeloff Assistant Professor of
Mechanical Engineering at MIT. “We got this crazy stuff, particles covered in
nanowires,” he says.
The resulting process could turn out to be an important new method for
manufacturing structures that span a range of sizes down to a few nanometers
(billionths of a meter) in size. “You go in one step from solid spherical
powder to very complex structures,” says Christopher Love, a mechanical
engineering graduate student who is lead author on the paper. “The process is
very simple, and the structures are durable,” he says. These new structures
could be used for managing ...
Wells Manufacturing ABS Sensor Factory Testing
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