電子行業---紅膠之運用
<p><br/><br/><br/></p><p class="MsoNormal" align="center" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%; TEXT-ALIGN: center; mso-pagination: widow-orphan;"><b><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体;">红胶、贴片胶、贴片红胶的特性与使用方法<span lang="EN-US"><p></p></span></span></b></p><p></p><p></p><p style="TEXT-JUSTIFY: inter-ideograph; TEXT-INDENT: 18pt; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify; mso-char-indent-count: 2.0;"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt;">UNINWELL</span><span style="FONT-SIZE: 9pt;">国际作为世界高端电子胶粘剂的领导品牌,其开发的系列产品包括导电银胶、红胶、底部填充胶、<span lang="EN-US">TUFFY</span>胶、<span lang="EN-US">LCM</span>密封胶等。公司在全球拥有几十家世界五百强企业客户,最近,<span lang="EN-US">UNINWELL</span>国际与上海常祥实业强强联合,共同开发中国高端电子胶粘剂市场。</span></font><span style="FONT-SIZE: 9pt; FONT-FAMILY: 新宋体; mso-bidi-font-size: 10.5pt;">上海常祥实业有限公司</span><font face="宋体"><span style="FONT-SIZE: 9pt; COLOR: black; mso-ascii-font-family: ???; mso-hansi-font-family: ???;">根据自己生产的贴片胶的经验,结合世界顶级客户的使用工艺,</span><span style="FONT-SIZE: 9pt; COLOR: black;">介绍贴片胶的特性、各种工艺下的使用方法及其使用中出现的不良与对策等内容,并简要分析了贴片胶的未来发展趋势。<span lang="EN-US">
<p></p></span></span></font></p><p></p><p></p><p style="TEXT-JUSTIFY: inter-ideograph; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify;"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black;"><span style="mso-spacerun: yes;"> </span>1</span><span style="FONT-SIZE: 9pt; COLOR: black;">、 贴片胶的简单介绍<span lang="EN-US">
<p></p></span></span></font></p><p></p><p></p><p style="TEXT-JUSTIFY: inter-ideograph; TEXT-INDENT: 18pt; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify; mso-char-indent-count: 2.0;"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black;"><span style="mso-spacerun: yes;"> </span></span><span style="FONT-SIZE: 9pt; COLOR: black;">贴片胶,也称为<span lang="EN-US">SMT</span>粘接剂,它是红色的膏体中均匀地分布着硬化剂、颜料、溶剂等的粘接剂,主要用来将元器件固定在印制板上,一般用点涂的方法来分配。贴上元器件后放入烘箱或再流焊机加热硬化。它与所谓的焊膏是不相同的,一经加热硬化后,再加热也不会溶化,也就是说,贴片胶的热硬化过程是不可逆的。贴片胶的使用效果会因热三角化条件,被连接物的不同而有差异。使用时要根据生产工艺来选择贴片胶。<span lang="EN-US">
<p></p></span></span></font></p><p></p><p></p><p style="TEXT-JUSTIFY: inter-ideograph; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify;"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black;"><span style="mso-spacerun: yes;"> </span>2</span><span style="FONT-SIZE: 9pt; COLOR: black;">、 贴片胶的用途与用例 <span lang="EN-US"><p></p></span></span></font></p><p></p><p></p><p style="TEXT-JUSTIFY: inter-ideograph; TEXT-INDENT: 13.5pt; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify; mso-char-indent-count: 1.5;"><span style="FONT-SIZE: 9pt; COLOR: black;"><font face="宋体">由于生产工艺的不同,贴片胶的有途与所要求具有的特性也不尽相同。<span lang="EN-US">
<p></p></span></font></span></p><p></p><p></p><p style="TEXT-JUSTIFY: inter-ideograph; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify;"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black;">1)</span><span style="FONT-SIZE: 9pt; COLOR: black;">贴片胶的使用目的<span lang="EN-US">
<p></p></span></span></font></p><p></p><p></p><p style="TEXT-JUSTIFY: inter-ideograph; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify;"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black;"><span style="mso-spacerun: yes;"> </span>①</span><span style="FONT-SIZE: 9pt; COLOR: black;">波峰焊中防止元器件脱落 波峰焊工艺<span lang="EN-US">
<p></p></span></span></font></p><p></p><p></p><p style="TEXT-JUSTIFY: inter-ideograph; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify;"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black;"><span style="mso-spacerun: yes;"> </span>②</span><span style="FONT-SIZE: 9pt; COLOR: black;">再流焊中防止另一面元器件脱落 双面再流焊工艺<span lang="EN-US">
<p></p></span></span></font></p><p></p><p></p><p style="TEXT-JUSTIFY: inter-ideograph; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify;"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black;"><span style="mso-spacerun: yes;"> </span>③</span><span style="FONT-SIZE: 9pt; COLOR: black;">防止元器件位移与立处 再流焊工艺、预涂敷工艺 <span lang="EN-US"><p></p></span></span></font></p><p></p><p></p><p style="TEXT-JUSTIFY: inter-ideograph; TEXT-INDENT: 4.5pt; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify; mso-char-indent-count: .5;"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black;">④</span><span style="FONT-SIZE: 9pt; COLOR: black;">作标记 波峰焊、再流焊、预涂敷<span lang="EN-US">
<p></p></span></span></font></p><p></p><p></p><p style="TEXT-JUSTIFY: inter-ideograph; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify;"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black;">2)</span><span style="FONT-SIZE: 9pt; COLOR: black;">贴片胶的使用的工艺<span lang="EN-US">
<p></p></span></span></font></p><p></p><p></p><p style="TEXT-JUSTIFY: inter-ideograph; MARGIN-LEFT: 4.5pt; TEXT-INDENT: -4.5pt; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify; mso-char-indent-count: -.5;"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black;"><span style="mso-spacerun: yes;"> </span>① </span><span style="FONT-SIZE: 9pt; COLOR: black;">在使用波峰焊时,为防止印制板通过焊料槽时元器件掉落,而将元器件固定在印制板上。<span lang="EN-US">
<p></p></span></span></font></p><p></p><p></p><p style="TEXT-JUSTIFY: inter-ideograph; MARGIN-LEFT: 4.5pt; TEXT-INDENT: -4.5pt; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify; mso-char-indent-count: -.5;"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black;"><span style="mso-spacerun: yes;"> </span>② </span><span style="FONT-SIZE: 9pt; COLOR: black;">双面再流焊工艺中,为防止已焊好的那一面上大型器件因焊料受热熔化而脱落,要使有贴片胶。<span lang="EN-US">
<p></p></span></span></font></p><p></p><p></p><p style="TEXT-JUSTIFY: inter-ideograph; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify;"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black;"><span style="mso-spacerun: yes;"> </span>③ </span><span style="FONT-SIZE: 9pt; COLOR: black;">用于再流焊工艺和预涂敷工艺中防止贴装时的位移和立片。<span lang="EN-US">
<p></p></span></span></font></p><p></p><p></p><p style="TEXT-JUSTIFY: inter-ideograph; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify;"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black;"><span style="mso-spacerun: yes;"> </span>④ </span><span style="FONT-SIZE: 9pt; COLOR: black;">此外,印制板和元器件批量改变时,用贴片胶作标记。<span lang="EN-US">
<p></p></span></span></font></p><p></p><p></p><p style="TEXT-JUSTIFY: inter-ideograph; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify;"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black;"><span style="mso-spacerun: yes;"> </span>3</span><span style="FONT-SIZE: 9pt; COLOR: black;">、 贴片胶应具有的特性 <span lang="EN-US"><p></p></span></span></font></p><p></p><p></p><p style="TEXT-JUSTIFY: inter-ideograph; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify;"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black;">1)</span><span style="FONT-SIZE: 9pt; COLOR: black;">连接强度:<span lang="EN-US">SMT</span>贴片胶必须具备较强的连接强度,在被硬化后,既使在焊料熔化的温度也不剥离。 <span lang="EN-US"><p></p></span></span></font></p><p></p><p></p><p style="TEXT-JUSTIFY: inter-ideograph; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify;"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black;">2)</span><span style="FONT-SIZE: 9pt; COLOR: black;">点涂性:目前对印制板的分配方式多采用点涂方式,因此要求胶要具有以下性能:<span lang="EN-US">
<p></p></span></span></font></p><p></p><p></p><p style="TEXT-JUSTIFY: inter-ideograph; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify;"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black;"><span style="mso-spacerun: yes;"> </span>① </span><span style="FONT-SIZE: 9pt; COLOR: black;">适应各种贴装工艺<span lang="EN-US">
<p></p></span></span></font></p><p></p><p></p><p style="TEXT-JUSTIFY: inter-ideograph; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify;"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black;"><span style="mso-spacerun: yes;"> </span>② </span><span style="FONT-SIZE: 9pt; COLOR: black;">易于设定对每种元器件的供给量<span lang="EN-US">
<p></p></span></span></font></p><p></p><p></p><p style="TEXT-JUSTIFY: inter-ideograph; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify;"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black;"><span style="mso-spacerun: yes;"> </span>③ </span><span style="FONT-SIZE: 9pt; COLOR: black;">简单适应更换元器件品种<span lang="EN-US">
<p></p></span></span></font></p><p></p><p></p><p style="TEXT-JUSTIFY: inter-ideograph; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify;"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black;"><span style="mso-spacerun: yes;"> </span>④ </span><span style="FONT-SIZE: 9pt; COLOR: black;">点涂量稳定 <span lang="EN-US"><p></p></span></span></font></p><p></p><p></p><p style="TEXT-JUSTIFY: inter-ideograph; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify;"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black;">3)</span><span style="FONT-SIZE: 9pt; COLOR: black;">适应高速机:现在使用的贴片胶必须满足点涂和高速贴片机的高速化,具体讲,就是高速点涂无拉丝,再者就是高速贴装时,印制板在传送过程中,贴片胶的粘性要保证元器件不移动。 <span lang="EN-US"><p></p></span></span></font></p><p></p><p></p><p style="TEXT-JUSTIFY: inter-ideograph; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify;"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black;">4)</span><span style="FONT-SIZE: 9pt; COLOR: black;">拉丝、塌落:贴片胶一旦沾在焊盘上,元器件就无法实现与印制板的电气性连接,所以,贴片胶必须是在涂布时无拉丝、涂布后无塌落,以免污染焊盘。低温固化性:固化时,先用波峰焊焊好的不耐热插装元器件也要通过再流焊炉,所以要求硬化条件必须满足低温、短时间。 <span lang="EN-US"><p></p></span></span></font></p><p></p><p></p><p style="TEXT-JUSTIFY: inter-ideograph; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify;"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black;">5)</span><span style="FONT-SIZE: 9pt; COLOR: black;">自调整性:再流焊、预涂敷工艺中,贴片胶是在焊料溶化前先固化、固定元器件的,所以会妨碍元器件沉入焊料和自我调整。针对这一点,上海常祥实业有限公司已开发了一种可自我调整的贴片胶。<span lang="EN-US">
<p></p></span></span></font></p><p></p><p></p><p style="TEXT-JUSTIFY: inter-ideograph; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify;"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black;"><span style="mso-spacerun: yes;"> </span>4</span><span style="FONT-SIZE: 9pt; COLOR: black;">、 贴片胶的固化有用紫外线和热来固化的丙烯酸型,还有仅仅是热固化的环氧型。丙烯酸型贴片胶在短时间硬化、低温固化方面具有优势。目前也开发出了低温短时间硬化的环氧型贴片胶,以取代粘接力较差的丙烯型贴片胶。贴片胶的选择,还是要充分考虑前面提到的工艺、所使用元器件的耐热性,在机器上的寿命等因素,选择最佳产品。所谓在机器上的寿命,是指贴片胶离开了密闭、低温的保存条件,暴露在生产线的环境下时可保存的期限。</span></font></p><p style="TEXT-JUSTIFY: inter-ideograph; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify;"><font face="Simsun"><span style="FONT-SIZE: 9pt; COLOR: black;">因種種關係, 我們這邊是東莞騰威電子</span>材料科技有限公司的直接代理, 價格將有很大的優勢. 如有需要之朋友,可以共同分享. 希望此能製程帶來幫助!!</font></p>
页:
[1]