久久久久久久精品成人热小说,亚洲 欧美 激情 小说 另类,亚洲精品国产精华液,激烈 痉挛 抽搐 潮喷 MP4

News

Analysis of BGA soldering station knowledge

Release Date:2016-08-16

The meaning of BGA
BGA means chips packaged using BGA packaging technology.
There are four basic types of BGA: PBGA, CBGA, CCGA, and TBGA, which are generally connected to the bottom of the package as solder ball arrays for I/O output terminals
BGA soldering station
BGA soldering station, also known as BGA rework station, is a specialized equipment used when BGA chips have soldering problems or need to be replaced with new BGA chips
Classification of BGA soldering stations
1. Manual low-end models: suitable for BGA chip repair with a large pitch (0.6 or more) between BGA solder balls.
2. Semi automatic optical alignment model:
Using the principle of optical alignment to avoid errors in surface mounting.
3. Fully automatic machine vision alignment model: Based on the high-tech technology of machine vision alignment, a fully automatic repair process is achieved
The determining factors for choosing BGA soldering stations:
1. The size of the circuit board that needs to be repaired;
2. The size of the chip that needs to be soldered
3. Size of power supply
Requirements for BGA soldering stations:
Is there only three constant temperature zones;
2. Can the upper and lower heating heads be moved;
3. Does it have only curve settings;
4. Whether it has welding function;
5. Whether it has cooling function;
6. Is there a built-in vacuum pump
Reliability, testability, and ease of use of the equipment
1. The equipment should have safety protection functions, such as preventing safety accidents in the event of thermocouple, fan, or heating device failure.
2. The material selection of equipment components must be excellent and the wiring must be standardized.
3. The device has self testing function, which facilitates users to locate faults.
4. The interface settings are reasonable, the operation is convenient, and the various functional buttons are easy to find.
展開
两腿间花蒂被吸得异常肿大| 超碰视频在线| 国产精品妇女一二三区| 免费漫无遮挡画大全免费漫画| 99久久99久久免费精品蜜桃| 抱着h不拔出来h| 欧美vpswindows另类| 在线观看免费A∨网站| 国自产拍偷拍精品啪啪模特| 制服 小说 亚洲 欧美 校园 | 全免费A级毛片免费看网站| 女人张开腿让男桶喷水高潮 | 国产老头老太作爱视频| 小13箩利洗澡无码视频网站| 夜夜嗨AV一区二区三区| 亚洲综合久久日日躁综合| 波多野结衣中文字幕| 亚洲区小说区图片区QVOD| 亚洲欧美一区二区成人片 | 日韩精品人妻系列无码AV东京| 久久99国产精品片久久99蜜桃| 我给妺妺开的处苞视频| 在线观看视频| 女人脱了内裤高潮喷水30分钟| 国产精品久久久久免费A∨| 人妻丰满熟妇AV无码片| 国产偷窥熟妇高潮呻吟| ass白嫩白嫩的pic| 与80岁老太做爰a片免费看| 午夜不卡久久精品无码免费| 最近韩国日本免费观看MV百度| 国产精品亚洲一区二区三区| 人妻丰满熟AV无码区HD| 男女啪啪做爰高潮全过有多少姿势| 日本少妇裸体做爰高潮片| 色综合久久网| 女人最不吉利的5颗痣| 国产成人无码精品久久久APP| 日日噜噜夜夜狠狠久久蜜桃| WWW.色五月| 人人妻人人澡人人爽欧美二区 |