国产精品福利一区二区,精品国产免费人成电影在线看,久久精品亚洲国产,激情综合色综合啪啪五月丁香,中文毛片无遮挡高潮免费,成在人线AV无码免费高潮喷水,黄A无码片内射无码视频,无码视频一区二区三区,成AV免费大片黄在线观看,丁香色婷婷国产精品视频

      Welcome to the official website of Legret Metal Company
      Focus on electronic welding for 20 yearsDONGGUAN LEGRET METAL.,LTD
      National consultation hotline:135-2799-2739
      Contact US
      mobile phone: 135-2799-2739
      Service hotline: 0769-38893080
      Email: lzd@dglzd.com
      Address: Dongguan lvzhidao Metal Co., Ltd
      Contact person: Manager Zeng
      Industry information

      What is reflow soldering commonly used in solder field?

      作者:綠志島焊錫廠 2021-03-12 0

      Reflow soldering, foreign name 回流焊, reflow soldering technology is no stranger in the field of electronic manufacturing. The components on various hardware boards used in our computer are welded to the circuit board by reflow soldering.


      Reflow soldering is to weld the components to the PCB board and mount the components on the surface. The reason why it is called "reflow welding" is that the gas circulates in the welding furnace to produce high temperature, so as to achieve the purpose of welding.


      There is a heating circuit inside the reflow soldering furnace, which heats the air or nitrogen to a certain temperature and then blows it to the circuit board which has been attached with components. Depending on the effect of hot air flow on the solder joint, the colloidal flux carries out physical reaction under a certain high temperature air flow to achieve SMD welding; The welding material on both sides of the component melts and connects with the motherboard.


      The advantage of this welding technology is that the temperature is easy to control, the excessive oxidation can be avoided in the welding process, the variable is small, and the manufacturing cost is easier to control;


      The quality of reflow soldering will be affected by many factors, the most important factor is the temperature curve of reflow soldering furnace and the composition of solder paste in the process of electronic processing.


      Now the high performance reflow soldering furnace which is often used can adjust and control the temperature curve more conveniently; Therefore, in the trend of miniaturization and high density, solder paste printing has become the key factor of reflow soldering quality, template, printing and solder paste can affect the quality of solder paste printing.



      綠志島金屬有限公司是一家專(zhuān)業(yè)生產(chǎn)焊錫膏、焊錫線(xiàn)、焊錫條的公司,擁有自己的科研部門(mén),專(zhuān)業(yè)生產(chǎn)、銷(xiāo)售電子焊接使用的金屬材料、電鍍錫制品、電子化學(xué)品等。

      公司通過(guò)了ISO9001:2015國(guó)際質(zhì)量體系認(rèn)證,ISO14001:2015環(huán)境管理體系認(rèn)證和SGS中多項(xiàng)ROHS以及REACH的檢測(cè);中國(guó)賽寶實(shí)驗(yàn)室可靠性研究認(rèn)定。


      国产A级三级三级三级| 中国精品无码免费专区午夜| 亚洲AV永久无码天堂网毛片| 亚洲综合伊人| av淘宝国产在线观看| 国自产拍亚洲免费视频| 成年免费A级毛片免费看丶| 色综合久久成人综合网| 中文字幕无码毛片免费看| 55夜色66夜色国产精品视频| 永久免费看啪啪的网站| 国语自产拍在线视频中文| 国产精品亚洲А∨无码播放精品| 大又大粗又爽又黄少妇毛片| 亚洲国产精品悠悠久久琪琪| 亚洲综合资源| 18禁裸乳无遮挡啪啪无码免费| 亚洲av永久中文无码精品| 韩国丰满的少妇2| 久久亚洲精品成人AV无码网站 | 亚洲精品国产成人无码| 无码人妻丰满熟妇精品区| 欧美亚洲一区二区三区| 国产jizz中国jizz免费看| 无码中文人妻在线一区二区三区| 久久久久久久AV免费| 超碰97久久国产精品牛牛| 午夜电影一区二区| 成人亚洲欧美日韩在线观看 | 久久亚洲色一区二区三区| 国产精品免费av片在线观看| 亚洲春色在线视频| 首页 综合国产 亚洲 丝袜| 国产99高清一区二区| 国产视频九色| 亚洲avav国产av综合av| 国产老妇伦国产熟女老妇视频| 国产 麻豆 日韩 欧美 久久| 国产精品 高清 尿 小便 嘘嘘| 男女无遮挡xx00动态图120秒| 毛多水多www偷窥小便|