High Standard Durostone Surface Mount Process Carriers for PCB Assembly

High Standard Durostone Surface Mount Process Carriers for PCB Assembly

Surface Mount Process Carriers are engineered to completely fixture a circuit board during the overall assembly process. These carriers are made of high-temperature semi-conductive composite materials, used from start to finish in the assembly process.

Surface Mount Process Carriers have many features and benefits which enhance automated assembly and increase production by:

1. Reducing set-up time.
2. Eliminating unnecessary PCB board handling by operators.
3. Minimizing board warping.
4. Eliminate expensive hand masking and labour costs.
5. Standardizing process repetition.
6. Machine parameters.
7. Minimizing soldering defects.

Surface Mount Process Carriers are made of composite materials with advantageous features such as:

1. High-temperature compatibility to endure repeated cycles through the re-flow.
2. Material stability to ensure board alignment is consistent.
3. Chemical resistance for increased durability through harsh cleaning process.

Specification:

TOP SIDE STANDARD FEATURES

Chuangwei’s standard PCB hold down is our low profile. It is unbreakable, ESD safe and guaranteed for the life of the pallet. The non-marring design applies 12 pounds of downward pressure without having to lift. Just twist! We also offer a high profile hold down, cam-lock and custom hold downs for connectors.

Chuangwei does not ‘tap’ the composite, we use all “metal to metal” fasteners ensuring a reliable and long lasting fixture.

We offer two sizes of extruded aluminum stiffeners and solder dams; for smaller pallets we have a 3/8” tall and for larger pallets we have a 3/4” tall design.

All pallets are engraved with the board name and our work order number for handy reference. All data associated with your pallet is stored to that work order number.

BOTTOM SIDE STANDARD FEATURES

All bottom side fasteners are made from 316 grade stainless steel. This eliminates solder sticking or wetting to the fastener.

All fasteners are thread locked.

Our goal is to design and build a solution that will give you:

1. Highest yields with the largest process window possible.
2. Easy to use tooling that will survive your manufacturing environment.
3. Fastest delivery times possible.

Process Suitability

The viability of this process route crucially relies upon being able to estimate the number and distribution of PTH components

which CAN'T be processed (with and without glue dotting) - These will have to be miniwaved or hand soldered.
which are likely to be poorly soldered - These will require further inspection and manual touch up.

This estimation may be done in three ways

If a PCB is available (preferably populated) - our sales engineers can rapidly evaluate your board.
If PCB design data is available we will process, analyse and remotely assess it.
You can do it using the rules presented below - our customers quickly find that the above two methods are easiest.

Gerber, Excellon and other data required

Pin Land to SMT pad clearance evaluation

The two figures below each show part of a CSWSC in plan and section views. The right hand figure shows that more clearance
is required when the connector orientation is perpendicular to the wave.

PTH Components Located Parallel to direction through wave

The clearance required between the pin land and SMT pad can be made quite
small, as the solder does not have to flow "under" the component pockets.

PTH Components Located Perpendicular to direction through wave.

A larger separation is required due to the solder having to flow "under"
component pockets.

Working your way around the underside of the PCB, identify which components
are parallel and perpendicular to the wave and assess the solderability of each
PTH connector by comparing the actual separation against the graph right.

Ideally you want to be above the line in all cases.

PCB Design Implications - for Board Designers - or respin

We are often called upon by our customers to help with identifying design respin opportunities.

We will identify problem areas within a board and suggest appropriate movements of components. (Ideally before the PCB is fabricated)

However for board designers reading this, can you remember another four "rules" (to compete with the hundred other rules you have to have floating
around in your head).

Keep large (height) SMT components away from PTH areas.
Leave the leading and trailing areas around PTH components as clear as possible.
DON'T put any SMT components within 3mm (0.12") of any PTH components.
DON'T put all PTH components in line along one edge of a board - leave some space to allow us to support the masking in the centre of the board.

Our production flow

CE approval

Clients from electronic industry.

More information,please contact us:

Email/Skype: s5@smtfly.com

Mobile/Wechat/WhatsApp: +86-136-8490-4990

Shenzhen SMTfly Electronic Equipment manufactory Established in 2015,but its factory chuangwei is specializes in the sales PCB depanel,PCB separate,PCB depaneling, PCB separating , PCB depanelizer,PCB separator,PCB depaneler,PCB separater,PCB depanelization,PCB separation, v-cut pcb depaneling,v-cut pcb separator, Aluminium pcb depaneling,PCB separating,PCB punching machine,Aluminium pcb separator, FPC punching machine,PCB/FPC model punching machine,Touch screen sticking film machine,Hot bar solding machine,Welding machine and distribution of production equipments and accessories used in the Electronics Assembly Industry. Chuangwei has been in business since 1999 and has gained a good reputation for outstanding quality and customer service. Our customer reference includes many of the home and abroad leading product manufacturers and Electronics Service Providers likeFoxconn, Foxlink. Jabil, Desay, Nokia, Olympus, Philips, Sony etc.

Covering an area of over 2000 square meters ,we now have over 35 employees,boast an annual sales figure that exceeds USD 4000000 and currently export 45% of our production worldwide.

Oue well-equipped facilities and exxcellent quality control throughout all stages of production enable us to guarantee total customer satisfaction .Beside,we have received CE certificate.

As a result of our high quality products and outstanding customer service ,we have gained a global sales network reaching Europe and America .

If you interested in any of our products or would like to discuss a custom order,please feel free to contact us ,We are looking forward to forming successful business relationships with new clients around the world in the near future.