The Secret Guide To Pcb Panelization

Pcb panelization refers to the process of putting together a small PCB directly from the manufacturer to make a whole block.

★ Why do you need to panelize pcb, what are the benefits of doing so?

1. To meet the needs of production. Some PCB boards are too small to meet the requirements of making fixtures, so they need to be put together for production.

2. To improve the soldering efficiency of SMT placement. Only one SMT pass is required to complete the soldering of multiple PCB.

3. Improve cost utilisation. Some PCBs are shaped, and the patchwork can be a more efficient use of PCB area, reduce waste and improving the utilization of costs.

★ How many ways are there to design a pcb panel?

1.V-CUT

V-CUT is a slot drawn in the joint of two boards, as long as the two boards are put together, leaving a gap between them (usually 0.4mm), but the joint of the boards is thinner in this area and easy to break when putting together the boards you need to merge the edges of the two boards.

V-CUT is generally straight, there will not be curved arcs and other complex alignments, try to be in a straight line when putting together the board.

2.Stamp hole

For irregular PCB boards, such as round ones, V-CUT cannot do the job, and this is when stamp holes are used to make the splice connection, so stamp holes are generally used more often in shaped boards.

The edges of the two panels are joined by a small piece of plate that has many small holes in the joint with the two panels, making it easy to break. When broken, the edge of the board resembles the edge of a postage stamp, hence the name of this type of paneling.

3.Hollow joint strips

Hollow joints are used more often in panels with a half-hole process, where very narrow panels are joined, somewhat similarly to stamp holes, except that the joint is a little narrower and there are no over holes on either side.

The hollow joint has one disadvantage: when the board is broken open, there is a very visible bump. The stamp holes also have a bump, which is not so obvious because they are separated by the over holes.

Some people may think that it would be better to use the stamp holes instead of the hollow joints. This is because when making a module with half holes all around, neither the stamp holes nor the V-CUT can be used and can only be connected at the four corners of the module through hollow strips.

★ What are the principles of paneling?

For ease of production, keep the boards square in shape as much as possible after piecing. In short, do not let the length to width ratio vary too much.

★ Spacing requirements:

1. For PCB where the outermost edge of the component is <3mm from the board edge a process edge must be added, usually with the longer edge as the process edge.

2. A space of >0.5mm should be reserved between the component and the V-CUT to ensure proper tool operation.

Comments

The biggest problem with the latest 56 semiconductor manufacturers suspend orders, price increased, and long lead time. How can you fix it?

Following the suspension of MCU orders by ELAN , Holtek Semiconductor issued a notice on 21st April suspending orders with immediate effect. The price of various semiconductors, especially MCUs, has risen as a result of factors such as the tightness of 8-inch wafer foundries. The demand for MCUs is so high that many major MCU manufacturers at home and abroad are operating at full capacity, but supply still exceeds demand. In its notice, Holtek Semiconductor stated that Suspension of orders for 2022 Subject: Orders with delivery dates in 2022 are suspended with immediate effect. Description: 1. The wafer fabs and packaging houses have advised that there will be another wave of price increases soon - price increases of 15%-30%. 2. The fabs are expected to provide 2022 production numbers by early May and will announce 2022 order acceptance rules when confirmed. 3. expected to resume accepting orders for 2022 by mid-May. 4. 2022 orders that have received deposits will be rescheduled

Understanding of DC-DC buck bootstrap circuit

In the peripheral circuit design of DC-DC BUCK chips, we usually add capacitors or a combination of capacitors + resistors between the BOOT and SW pins, this piece of circuit is called bootstrap circuit, the capacitors and resistors in the bootstrap circuit are called bootstrap capacitors and bootstrap resistors. What is a bootstrap capacitor? DCDC Buck chip has a pin called BOOT, and some are called BST. The following is an explanation of the BOOT pin of a DCDC chip. In the external circuit design, a capacitor, generally 0.1uF, is needed between the BOOT and SW pin, and is connected to the driver end of the high-end MOS tube of DCDC. How does a bootstrap capacitor work? The following is a block diagram of a DCDC BUCK chip, the top NMOS is called the high-side MOSFET and the bottom NMOS is called the low-side MOSFET. When the high side MOS tube is turned on, SW is VIN, SW charges and stores energy in the inductor, and the inductor current is rising; when the low side MOS

2022 global chip shortage continues: ST、NXP、ADI、XILINX、ONSEMI、DIODES... latest trends

Under the influence of the epidemic and various emergencies around the world, the global chip industry fell into a shortage of stock in 2021. Now it has been a year, and the shortage of chips seems to have not eased. Below, we have collated the latest market developments of the original chip manufacturers such as ST, Renesas, NXP, ADI, ON Semiconductor, Microchip, Qualcomm, etc., so that you can have a good idea of the market situation. ST: Large shortage of high-end products and automotive chips Most stockists have been selling off since the prices of ST products have fallen back, but this month has seen a small rebound. For example, STM8S003F3P6TR and STM32F103VCT6 , two pieces of material, have seen a small price increase. It is worth noting that the market price of ST's brake system chips has recently soared, and other automotive chips have also risen, and there is still a large shortage of high-end products and automotive chips, and delivery times are still long. In additi

Teach you 5 ways to identify and avoid counterfeit electronic components in a second

In the process of purchasing electronic components, the most worrying thing for buyers is not the price, but the quality of the product. There are a variety of IC chips on the market, of all kinds, and without paying attention to the distinction, it is sometimes difficult to see the difference between various materials, whether it is true or false, new or refurbished. The following is a compilation of some methods to identify genuine and fake chips, for your reference. Common chip counterfeiting methods Material A counterfeit material A Original manufacturer's tailor loose material: the original packaging has been disassembled or is no longer available, but product functionality and yield may be lower due to storage time or handling process, etc. Original manufacturer scrap or defective products: mainly products that have not passed factory inspection by the original manufacturer, such as scrap products after reliability testing, poor packaging quality, bad test products, etc. Orig

9 effective ways to improve your electronic components specification for approval

1. Let purchasers find manufacturers to provide specifications, safety information, environmental protection information, insurance information - E-document 2. Verify that the information is true and complete, such as the applicable period of the document, so as not to be fooled by the manufacturer. 3. Let the buyer find the manufacturer to provide samples, specifications, safety information, environmental information, insurance information - Paper files 4. Environmental test: send several samples to the environmental laboratory for ROSH halogen test. 5. Electrical specifications and high-temperature testing - e.g. electrolytic capacitors : A: measuring capacity and deviation withstand voltage, PIN foot tin is good B: go through the production line to see if the capacitors are deformed after the high temperature of the furnace and if the capacity and the deviation voltage are okay. 6. Body size check - e.g. electrolytic capacitors . Body height and diameter, PIN pin spacing, PIN pin d

Seektronics

Search This Blog