RMB | USD

17 kinds of components PCB packaging illustration book, full of beauty!

By：Jasencan

Time：2020.09.08

View：

The construction of component packaging is an important part of PCB design. A small mistake may cause the entire board to fail to work and serious delays in the construction period. The package library of conventional devices generally has its own CAD tools, and it can also be obtained from the original design documents and reference design source drawings of the device.
The package name and graphics are as follows
 
Transistor

Crystal oscillator

inductance

Connector

Discrete Components

Transistor

Variable capacitance

Digital Tube

Adjustable resistance

resistance

Exclusion

Relay

switch

Jumper

integrated circuit

1.5mmBGA

1mmBGA

1.27BGA

A well-qualified device package should meet the following conditions:

1. The designed pad should be able to meet the size requirements of the length, width and spacing of the target device pin.

Special attention should be paid to: the dimensional error produced by the device pin itself should be taken into account in the design --- especially the precise and detailed devices and connectors.

Otherwise, it may lead to different batches of the same type of devices, sometimes the welding process yield is high, sometimes large production quality problems occur!

Therefore, the compatibility design of the pad (appropriate and common to most large manufacturers' device pad size design) is very important!

On this point, the simplest requirements and inspection methods are:

Put the actual target device on the pad of the PCB board for observation, if each pin of the device is in the corresponding pad area.

The package design of this pad is basically not a big problem. Conversely, if some of the pins are not in the pad, it is not good.

2. The designed pad should have an obvious direction mark, preferably a universal and easily distinguishable direction polarity mark. Otherwise, when there is no qualified PCBA sample for reference,

If a third party (SMT factory or private outsourcing) does the welding process, the problem of reverse polarity and wrong welding will easily occur!

3. The designed pad should be able to meet the processing parameters, requirements and processes of the specific PCB circuit factory itself.

For example, the pad line size, line spacing, character length and width that can be designed, etc. If the PCB size is large, it is recommended that you design according to the popular and common PCB factory process in the market, so that when the PCB supplier is changed due to quality or business cooperation issues, there are too few PCB manufacturers to choose from and the production schedule is delayed.

This article is organized from the Internet.


泰科天润官网：http://www.globalpowertech.cn/

Diàngǎn
2/5000
 
 
 
inductance