<*n>表面贴装型*n>LED<*n>使用注意事项*n>
TOP SMD LED Application Notes
1.<*n>特点*n>Features<*n>:*n>
<*n>通过这个资料,达到让*n><*n>阶新科技*n><*n>的客户清楚地了解*n>LED<*n>的使用方法的目的。*n>
2.<*n>描述*n>Description<*n>:*n>
<*n>通常*n>LED<*n>也象其它的电子元件一样有着相同的使用方法,为一让客户更好地使用*n><*n>阶新科技*n><*n>的*n>LED<*n>产品,请参看下面的*n><*n>LED*n><*n>保护****措施。*n>
3.<*n>注意事项*n>Cauti*<*n>:*n>
3.1<*n>灰尘与清洁*n>Dust & Cleaning<*n>:*n>
LED<*n>的表面是采用硅树脂胶封装的*n><*n>,*n><*n>硅树脂对于*n>LED<*n>的光学系统和*老化性能都起到很好的保护作用*n><*n>。*n><*n>可硅树脂质柔软*n><*n>,*n><*n>易粘灰尘*n><*n>,*n><*n>因此*n><*n>,*n><*n>要保持作业环境的洁净*n>.<*n>当然*n><*n>,*n><*n>在*n>LED<*n>表面有一定限度内的尘埃*n><*n>,*n><*n>也不会影响到发光亮度*n><*n>,*n><*n>但我们仍应避免尘埃落到*n>LED<*n>表面*n><*n>,*n><*n>打开包装袋的就优先使用*n><*n>,*n><*n>安装过*n>LED<*n>的组件应存放在干净的容器中等*n><*n>。*n>
<*n>在*n>LED<*n>表面需要清洁时*n><*n>,*n><*n>如果使用****或者*等溶液会出现使*n>LED<*n>表面溶解等现象*n><*n>,*n><*n>不可使用具用溶解性的溶液清洁*n>LED<*n>,*n><*n>可使用一此*的溶液*n><*n>,*n><*n>在使用任何清洁溶液之前都应确认是否会对*n>LED<*n>有溶解作用*n><*n>。*n>
<*n>请不要用超声波的方法清洁*n>LED<*n>,如果产品必须使用超声波,那么就要评估影响*n><*n>LED*n><*n>的一些参数,如超声波功率,烘烤的时间和装配的条件等,在清洁之前必须试运行,确认是否会影响到*n><*n>LED*n><*n>。*n>
3.2<*n>装运及保存*n>Shipment and storage<*n>:*n>
TOP SMD LED<*n>属于湿敏元件,将*n><*n>LED*n><*n>包装在铝膜的袋中是为了避免*n><*n>LED*n><*n>在运输和储存时吸收湿气,在包装袋中放有干燥剂,以吸收袋内的湿气。如果*n><*n>LED*n><*n>吸收了水气,那么在*n><*n>LED*n><*n>过回流焊时,在高温状态下,渗入其中的湿气快速膨胀气化而产生较大的内应力,从而使材料胶裂、分层或损伤键合金丝,造成产品失效。*n>
TOP SMD LED<*n>采用具有防潮防静电的铝箔袋包装,搬运过程中应避免挤压、刺穿包装袋的情形发生,并且做好必要的防静防护措施;*n><*n>若*n><*n>产品上线前已发现漏气或*损,请直接停止使用;并做必要的高温除湿动作后使用;产品在转料、贴装过程、及成品出货、安装过程应注意****外力直接或间接作用于*n>LED<*n>灯体,造成外力损伤*n><*n>LED*n><*n>灯珠,造成产品失效;*n>
<*n>如上料前,已发现防潮防静电的铝箔袋已拆封、*损、穿孔可及时退回原厂重新进行除湿,*可上线使用;*n>
<*n>此款产品的湿敏等级为*n> LEVEL5a.
<*n>表一:*n> IPC/JEDEC J-STD-020 <*n>规定的材料防潮等级(*n><*n>MSL)*n><*n>定义*n><*n>Chart 1:Definition of material*SL prescribed by IPC/JEDECJ-STD-020*n>
<*n style="font-family:Arial;font-size:10pt;">防潮等级*n><*n style="font-family:Arial;font-size:10pt;">*n> <*n style="font-family:Arial;font-size:10pt;">Moisture proof*n><*n style="font-family:Arial;font-size:10pt;">*n> |
<*n style="font-family:Arial;font-size:10pt;">包装拆封后车间寿命*n><*n style="font-family:Arial;font-size:10pt;">*n> <*n style="font-family:Arial;font-size:10pt;">Workshop life*n after open the packaging*n><*n style="font-family:Arial;font-size:10pt;">*n> |
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<*n style="font-family:Arial;font-size:10pt;">时间*n><*n style="font-family:Arial;font-size:10pt;">*n> <*n style="font-family:Arial;font-size:10pt;">Time*n><*n style="font-family:Arial;font-size:10pt;">*n> |
<*n style="font-family:Arial;font-size:10pt;">条件*n><*n style="font-family:Arial;font-size:10pt;">*n> <*n style="font-family:Arial;font-size:10pt;">condition*n><*n style="font-family:Arial;font-size:10pt;">*n> |
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<*n style="font-family:Arial;font-size:10pt;">LEVEL1*n><*n style="font-family:Arial;font-size:10pt;">*n> |
<*n style="font-family:Arial;font-size:10pt;">无限制*n><*n style="font-family:Arial;font-size:10pt;">*n> |
<*n style="font-family:Arial;font-size:10.0000pt;">≦30℃/85 % RH*n><*n style="font-family:Arial;font-size:10.0000pt;">*n> |
<*n style="font-family:Arial;font-size:10pt;">LEVEL2*n><*n style="font-family:Arial;font-size:10pt;">*n> |
<*n style="font-family:Arial;font-size:10pt;">1*n><*n style="font-family:Arial;font-size:10pt;">年*n><*n style="font-family:Arial;font-size:10pt;">*n> |
<*n style="font-family:Arial;font-size:10.0000pt;">≦30℃/60 % RH*n><*n style="font-family:Arial;font-size:10.0000pt;">*n> |
<*n style="font-family:Arial;font-size:10pt;">LEVEL2a*n><*n style="font-family:Arial;font-size:10pt;">*n> |
<*n style="font-family:Arial;font-size:10pt;">4*n><*n style="font-family:Arial;font-size:10pt;">周*n><*n style="font-family:Arial;font-size:10pt;">*n> |
<*n style="font-family:Arial;font-size:10.0000pt;">≦30℃/60 % RH*n><*n style="font-family:Arial;font-size:10.0000pt;">*n> |
<*n style="font-family:Arial;font-size:10pt;">LEVEL3*n><*n style="font-family:Arial;font-size:10pt;">*n> |
<*n style="font-family:Arial;font-size:10pt;">168*n><*n style="font-family:Arial;font-size:10pt;">小时*n><*n style="font-family:Arial;font-size:10pt;">*n> |
<*n style="font-family:Arial;font-size:10.0000pt;">≦30℃/60 % RH*n><*n style="font-family:Arial;font-size:10.0000pt;">*n> |
<*n style="font-family:Arial;font-size:10pt;">LEVEL4*n><*n style="font-family:Arial;font-size:10pt;">*n> |
<*n style="font-family:Arial;font-size:10pt;">72*n><*n style="font-family:Arial;font-size:10pt;">小时*n><*n style="font-family:Arial;font-size:10pt;">*n> |
<*n style="font-family:Arial;font-size:10.0000pt;">≦30℃/60 % RH*n><*n style="font-family:Arial;font-size:10.0000pt;">*n> |
<*n style="font-family:Arial;font-size:10pt;">LEVEL5*n><*n style="font-family:Arial;font-size:10pt;">*n> |
<*n style="font-family:Arial;font-size:10pt;">48*n><*n style="font-family:Arial;font-size:10pt;">小时*n><*n style="font-family:Arial;font-size:10pt;">*n> |
<*n style="font-family:Arial;font-size:10.0000pt;">≦30℃/60 % RH*n><*n style="font-family:Arial;font-size:10.0000pt;">*n> |
<*n style="font-family:Arial;font-size:10pt;">LEVEL5a*n><*n style="font-family:Arial;font-size:10pt;">*n> |
<*n style="font-family:Arial;font-size:10pt;">24*n><*n style="font-family:Arial;font-size:10pt;">小时*n><*n style="font-family:Arial;font-size:10pt;">*n> |
<*n style="font-family:Arial;font-size:10.0000pt;">≦30℃/60 % RH*n><*n style="font-family:Arial;font-size:10.0000pt;">*n> |
<*n style="font-family:Arial;font-size:10pt;">LEVEL6*n><*n style="font-family:Arial;font-size:10pt;">*n> |
<*n style="font-family:Arial;font-size:10pt;">取出即用*n><*n style="font-family:Arial;font-size:10pt;">*n> |
<*n style="font-family:Arial;font-size:10.0000pt;">≦30℃/60 % RH*n><*n style="font-family:Arial;font-size:10.0000pt;">*n> |
3.3<*n>开封前的储存*n>Storage before unsealing:
<*n>为了避免由吸湿受潮引发的可靠性失效问题,需做好*n>LED<*n>产品*n><*n>SMT*n><*n>前储存与防潮措施;*n>
<*n>如果防潮袋没有打开,*n>EC LED<*n>元件的保存时间为*n><*n><30°C/60%RH*n><*n>下*n><*n>4*n><*n>个月以内;(注:以标签日期为准,且包装无漏气现像、湿度指示卡防潮珠未变色的前提下使用;针对不同防潮等级材料或包装保存的时间有一定的差异,具体保存时间以规格书或包装袋提示为准);建议在未装配前不要随意打开防潮袋;*n>
3.4<*n>包装袋拆封后的控制*n>Co*ol after the packing bag is opened:
<*n>打开防潮袋后,请立即阅读防潮袋内湿度指示卡中的防潮珠是否变为粉红色以确认防潮袋中的湿气是否过多,根据防潮珠的颜色以判定此袋材料是否可以上线作业;且打开包装后材料应严格控制在表一所规定的温湿度及操作时间允许范围内,只要材料暴露在表一所述的环境中,则需累计其在车间的使用时间。打开包装袋后并贴在*n>PCB<*n>板上的材料,应在*n>0.5H<*n>内完成焊接工作,不建议将材料贴在*n>PCB<*n>上,长时间呆置在车间内不进行*n><*n>SMT*n><*n>过炉作业;以免材料吸收锡膏内水分造成不良引患*n><*n>;*n>
3.5<*n>湿度卡的定义*n>Definition of humidity card:
<*n>拆开包装后*n>TOP SMD LED<*n>包装袋内湿度卡颜色指示处理方式如下:*n>
a. <*n>如果湿度卡防潮珠*n>10%<*n>处变为粉红色,其它档为蓝色,此种情况,*n><*n>LED*n><*n>可以直接使用;*n>
b. <*n>如果湿度卡防潮珠*n>10%<*n>、*n><*n>20%*n><*n>处均变为粉红色,其实档为蓝色,此种情况,需对元件进行低温烘烤除湿;*n>
c. <*n>如果湿度卡防潮珠*n>10%<*n>、*n><*n>20%*n><*n>、*n><*n>30%*n><*n>三处以上均变为粉红色,此种情况下,客户需将材料寄回我司进行高湿除湿,重新包装后方可使用;*n>
3.6.<*n>未使用完的材料防潮保存*n> <*n>及*n> <*n>已完成装配的材料防潮控制*n>Unwanted material moisture-proof storage and moisture-proof co*ol of finished material
<*n>如果一卷*n>SMD<*n>材料未一次性用完,且车间温湿度在限定之条件(*n><*n><30°C/60%RH)*n><*n>内,元件在空气中暴露时间未超出*n><*n>2H*n>,<*n>则余下材料应于干燥剂一起进行抽真空密封保存,否则,材料必须低湿烘烤除湿;除湿后的材料重新包装可重新开始计算时间;对已完成装配的*n>SMD<*n>元件进行防潮控制 *n>
1) <*n>对已装配到*n>PCB<*n>板后的元件不需再经过高温工序或回流焊工艺,则将不作特殊处理;*n>
2) <*n>对需要做灌胶、滴胶或包胶防护处理的产品,建议产品在做相应防护工艺前做好必要的除湿工作,在*n>70℃±5℃<*n>的烤箱中烘烤不少于*n><*n>12*n><*n>小时,以剔除产品在检测、老化过程中暴露在空气中吸收的水分,以避免产品在做防护处理后,包在材料表面的湿气会慢慢*产品,会造成产品失效;*n>
3) <*n>对需要进行二次*n>SMT<*n>工艺或高温的产品,在完成一次焊接后将会进行二次焊接前,亦应做好必要的防潮处理,暴露在(*n><*n><30°C/60%RH) *n><*n>条件下,不可超过*n><*n>2H*n>,若<*n>二次高温工艺相隔时间较长,则一次焊接后的材料必需进行必要的除湿工作(在*n>70℃±5℃<*n>的烤箱中烘烤不少于*n><*n>12*n><*n>小时),然后抽真空密封保存;或者先将产品贮存在干燥箱内或带有干燥剂的容器内,二次高温工艺前,再做除湿工作(在*n><*n>70℃±5℃*n><*n>的烤箱中烘烤不少于*n><*n>12*n><*n>小时),以确保产品在过高温工艺前不受潮;*n>
<*n>低湿烘烤条件:*n>70°C±5°C <*n>烘烤不小于*n><*n>24*n><*n>小时*n>
<*n>高温烘烤条件:*n>130°C±5°C <*n>烘烤不小于*n><*n>6*n><*n>小时(灯珠必需拆成散粒)*n>
3.7<*n>回流焊接*n>Reflow Soldering Characteristics
<*n>经*n><*n>阶新科技*n><*n>采用下面所列参数检测证明,表面贴装型*n>LED<*n>符合*n><*n>JEDEC J-STD-020C*n><*n>标准。作为一般指导原则,*n><*n>阶新科技*n><*n>建议客户遵循所用焊锡膏制造商推荐使用的焊接温度曲线。*n>
<*n>请注意此一般指导原则可能并不适用于所有*n>PCB<*n>设计和回流焊设备的配置。*n>
<*n style="font-family:宋体;font-size:9pt;">温度曲线特点*n><*n style="font-family:宋体;font-size:9pt;">*n> <*n style="font-family:宋体;font-size:9pt;">Profile Feature*n><*n style="font-family:宋体;font-size:9pt;">*n> |
<*n style="font-family:宋体;font-size:9pt;">含铅焊料*n><*n style="font-family:宋体;font-size:9pt;">*n> <*n style="font-family:宋体;font-size:9pt;">Lead-Based Solder*n><*n style="font-family:宋体;font-size:9pt;">*n> |
<*n style="font-family:宋体;font-size:9pt;">无铅焊料*n><*n style="font-family:宋体;font-size:9pt;">*n> <*n style="font-family:宋体;font-size:9pt;">Lead-Free Solder*n><*n style="font-family:宋体;font-size:9pt;">*n> |
<*n style="font-family:宋体;font-size:9pt;">平均升温速度*n><*n style="font-family:Arial;font-size:9pt;">(Ts *n><*n style="font-family:Arial;font-size:6pt;">max *n><*n style="font-family:宋体;font-size:9pt;">至*n><*n style="font-family:Arial;font-size:9pt;">Tp )*n><*n style="font-family:Arial;font-size:9pt;">*n> <*n style="font-family:Arial;font-size:9pt;">Average Ramp -Up Rate (T*ax to Tp )*n><*n style="font-family:Arial;font-size:9pt;">*n> |
<*n style="font-size:9pt;"><*n>不超*n>*n><*n style="font-family:Arial;font-size:9pt;">3*n><*n style="font-family:宋体;font-size:9pt;">℃*n><*n style="font-family:Arial;font-size:9pt;">/*n><*n style="font-family:宋体;font-size:9pt;">秒*n><*n style="font-family:Arial;font-size:9pt;">*n> |
<*n style="font-family:宋体;font-size:9pt;"><*n style="font-family:宋体;">不超*n>*n><*n style="font-family:Arial;font-size:9pt;">3*n><*n style="font-family:宋体;font-size:9pt;">℃*n><*n style="font-family:Arial;font-size:9pt;">/*n><*n style="font-family:宋体;font-size:9pt;">秒*n><*n style="font-family:Arial;font-size:9pt;">*n> |
<*n style="font-family:宋体;font-size:9pt;">预热:*低温度*n><*n style="font-family:Arial;font-size:9pt;">(Ts *n><*n style="font-family:Arial;font-size:6pt;">min*n><*n style="font-family:Arial;font-size:9pt;">)*n><*n style="font-family:Arial;font-size:9pt;">*n> <*n style="font-family:Arial;font-size:9pt;">Preheat: Temperature Min (T*in)*n><*n style="font-family:Arial;font-size:9pt;">*n> |
<*n style="font-family:Arial;font-size:9pt;">100*n><*n style="font-family:宋体;font-size:9pt;">℃*n><*n style="font-family:Arial;font-size:9pt;">*n> |
<*n style="font-family:Arial;font-size:9pt;">150*n><*n style="font-family:宋体;font-size:9pt;">℃*n><*n style="font-family:Arial;font-size:9pt;">*n> |
<*n style="font-family:宋体;font-size:9pt;">预热:*高温度*n><*n style="font-family:Arial;font-size:9pt;">(Ts *n><*n style="font-family:Arial;font-size:6pt;">max*n><*n style="font-family:Arial;font-size:9pt;">)*n><*n style="font-family:Arial;font-size:9pt;">*n> <*n style="font-family:Arial;font-size:9pt;">Preheat: Temperature Min (T*ax)*n><*n style="font-family:Arial;font-size:9pt;">*n> |
<*n style="font-family:Arial;font-size:9pt;">150*n><*n style="font-family:宋体;font-size:9pt;">℃*n><*n style="font-family:Arial;font-size:9pt;">*n> |
<*n style="font-family:Arial;font-size:9pt;">200*n><*n style="font-family:宋体;font-size:9pt;">℃*n><*n style="font-family:Arial;font-size:9pt;">*n> |
<*n style="font-family:宋体;font-size:9pt;">预热:时间*n><*n style="font-family:Arial;font-size:9pt;">( ts *n><*n style="font-family:Arial;font-size:6pt;">min *n><*n style="font-family:宋体;font-size:9pt;">至*n><*n style="font-family:Arial;font-size:9pt;">ts *n><*n style="font-family:Arial;font-size:6pt;">max *n><*n style="font-family:Arial;font-size:9pt;">)*n><*n style="font-family:Arial;font-size:9pt;">*n> <*n style="font-family:Arial;font-size:9pt;">Preheat: Time ( t*i*t*ax )*n><*n style="font-family:Arial;font-size:9pt;">*n> |
<*n style="font-family:Arial;font-size:9pt;">60-120 *n><*n style="font-family:宋体;font-size:9pt;">秒*n><*n style="font-family:Arial;font-size:9pt;">*n> |
<*n style="font-family:Arial;font-size:9pt;">60-180 *n><*n style="font-family:宋体;font-size:9pt;">秒*n><*n style="font-family:Arial;font-size:9pt;">*n> |
<*n style="font-family:宋体;font-size:9pt;">维持高温温度的时间:温度*n><*n style="font-family:Arial;font-size:9pt;">(T*n><*n style="font-family:Arial;font-size:6pt;">L*n><*n style="font-family:Arial;font-size:9pt;">)*n><*n style="font-family:Arial;font-size:9pt;">*n> <*n style="font-family:Arial;font-size:9pt;">Time Maintained Above: Temperature (T L)*n><*n style="font-family:Arial;font-size:9pt;">*n> |
<*n style="font-family:Arial;font-size:9pt;">183 *n><*n style="font-family:宋体;font-size:9pt;">℃*n><*n style="font-family:Arial;font-size:9pt;">*n> |
<*n style="font-family:Arial;font-size:9pt;">217 *n><*n style="font-family:宋体;font-size:9pt;">℃*n><*n style="font-family:Arial;font-size:9pt;">*n> |
<*n style="font-family:宋体;font-size:9pt;">维持高温温度的时间:时间*n><*n style="font-family:Arial;font-size:9pt;">(t *n><*n style="font-family:Arial;font-size:6pt;">L*n><*n style="font-family:Arial;font-size:9pt;">)*n><*n style="font-family:Arial;font-size:9pt;">*n> <*n style="font-family:Arial;font-size:9pt;">Time Maintained Above: Time (t L)*n><*n style="font-family:Arial;font-size:9pt;">*n> |
<*n style="font-family:Arial;font-size:9pt;">60-150 *n><*n style="font-family:宋体;font-size:9pt;">秒*n><*n style="font-family:Arial;font-size:9pt;">*n> |
<*n style="font-family:Arial;font-size:9pt;">60-150 *n><*n style="font-family:宋体;font-size:9pt;">秒*n><*n style="font-family:Arial;font-size:9pt;">*n> |
<*n style="font-family:宋体;font-size:9pt;">峰值*n><*n style="font-family:Arial;font-size:9pt;">/*n><*n style="font-family:宋体;font-size:9pt;">分类温度*n><*n style="font-family:Arial;font-size:9pt;">(T *n><*n style="font-family:Arial;font-size:6pt;">P*n><*n style="font-family:Arial;font-size:9pt;">)*n><*n style="font-family:Arial;font-size:9pt;">*n> <*n style="font-family:Arial;font-size:9pt;">Peak/ Classification Temperature (T P)*n><*n style="font-family:Arial;font-size:9pt;">*n> |
<*n style="font-family:Arial;font-size:9pt;">215 *n><*n style="font-family:宋体;font-size:9pt;">℃*n><*n style="font-family:Arial;font-size:9pt;">*n> |
<*n style="font-family:Arial;font-size:9pt;">240 *n><*n style="font-family:宋体;font-size:9pt;">℃*n><*n style="font-family:Arial;font-size:9pt;">*n> |
<*n style="font-family:宋体;font-size:9pt;">在实际峰值温度*n><*n style="font-family:Arial;font-size:9pt;">( tp)5*n><*n style="font-family:宋体;font-size:9pt;">℃内的时间*n><*n style="font-family:宋体;font-size:9pt;">*n> <*n style="font-family:宋体;font-size:9pt;">Time Within 5℃ of Actual Peak Temperature ( tp)*n><*n style="font-family:宋体;font-size:9pt;">*n> |
<*n style="font-family:Arial;font-size:9pt;"><10 *n><*n style="font-family:宋体;font-size:9pt;">秒*n><*n style="font-family:Arial;font-size:9pt;">*n> |
<*n style="font-family:Arial;font-size:9pt;"><10 *n><*n style="font-family:宋体;font-size:9pt;">秒*n><*n style="font-family:Arial;font-size:9pt;">*n> |
<*n style="font-family:宋体;font-size:9pt;">降温速度*n><*n style="font-family:宋体;font-size:9pt;">*n> <*n style="font-family:宋体;font-size:9pt;">Ramp -Down Rate*n><*n style="font-family:宋体;font-size:9pt;">*n> |
<*n style="font-family:宋体;font-size:9pt;"><*n style="font-family:宋体;">不超*n>*n><*n style="font-family:Arial;font-size:9pt;">6*n><*n style="font-family:宋体;font-size:9pt;">℃*n><*n style="font-family:Arial;font-size:9pt;">/*n><*n style="font-family:宋体;font-size:9pt;">秒*n><*n style="font-family:Arial;font-size:9pt;">*n> |
<*n style="font-family:宋体;font-size:9pt;"><*n style="font-family:宋体;">不超*n>*n><*n style="font-family:Arial;font-size:9pt;">6*n><*n style="font-family:宋体;font-size:9pt;">℃*n><*n style="font-family:Arial;font-size:9pt;">/*n><*n style="font-family:宋体;font-size:9pt;">秒*n><*n style="font-family:Arial;font-size:9pt;">*n> |
<*n style="font-family:Arial;font-size:9pt;">25 *n><*n style="font-family:宋体;font-size:9pt;">℃升至峰值温度所需时间*n><*n style="font-family:宋体;font-size:9pt;">*n> <*n style="font-family:宋体;font-size:9pt;">Time 25 ℃ to Peak Temperature*n><*n style="font-family:宋体;font-size:9pt;">*n> |
<*n style="font-family:宋体;font-size:9pt;"><*n style="font-family:宋体;">不超*n>*n><*n style="font-family:Arial;font-size:9pt;">6*n><*n style="font-family:宋体;font-size:9pt;">分钟*n><*n style="font-family:Arial;font-size:9pt;">*n> |
<*n style="font-family:宋体;font-size:9pt;"><*n style="font-family:宋体;">不超*n>*n><*n style="font-family:Arial;font-size:9pt;">6*n><*n style="font-family:宋体;font-size:9pt;">分钟*n><*n style="font-family:Arial;font-size:9pt;">*n> |
<*n>注:所有温度是指在封装本体上表面测得的温度。*n>
3.8.<*n>一般使用设计要求*n>General design requirements :
. SMT<*n>吸嘴要求:(*n><*n>红色圆圈指吸嘴内径*n><*n>)*n>
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OK(<*n>吸嘴内径大于灯珠发光区*n><*n>)*n> NG (<*n>吸嘴内径小于灯珠发光区*n><*n>)*n>
. <*n>材料取拿方式:用镊子夹取材料,不可按压胶体或尖锐物体碰刺胶体,材料不可堆叠放置;*n>
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OK <*n>正确的拿取方式*n> NG <*n>错误的拿取方式*n>
<*n>产品在进行*n>PCB布线设计时,针对软性板材、及0.5T以下板材,焊盘走向应与PCB延展方向保持垂直状态,以减少PCB板弯折时产生之应力作用在LED引脚,造成LED产品因应力作用拉伸产生失效隐患;
3.9.<*n>热量的产生及设计要求*n>Heat Generation:
· <*n>对于*n>LED<*n>产品,散热方面的设计是很重要的,在系统设计时请考虑*n><*n>LED*n><*n>所产生的热量,*n><*n>PCB*n><*n>板的热阻、*n><*n>LED*n><*n>放置的密度和相关组成,以及输入的电功率都会使温度增加。*n>
· <*n>为避免出现过多热量的产生,须保证*n>LED<*n>运行时要在产品规格书中所要求的*大规格范围之内。在设定*n><*n>LED*n><*n>的驱动电流时,应考虑到*高的环境温度。*n>
· <*n>产品*高工作湿度不易超过*n>40°C(<*n>即*n><*n>≤40°C*n>,<*n>指产品引脚处的工作温度)*n>
4.0.IC<*n>器件的防静电及电涌防护*n><*n>Electrostatic Discharge & Surge Current :*n>
· <*n>静电和电涌会伤害到*n>IC<*n>器件的*n><*n>LED*n><*n>产品,因此,必须做好相应的防护措施;*n>
· IC<*n>器件的信号输入输出端口必段串接防护电阻以防电涌或静电冲击端口造成产品失效;*n>
· <*n>为保护好*n>IC<*n>器件的*n><*n>LED*n><*n>产品,无论什么时间与场合,只要接触到*n><*n>LED*n><*n>时,都要穿带防静电手带,防静电脚带及防静电手套*n>
· <*n>所有的装置和仪器设备均须接地*n>
· <*n>建议每一种产品在出货前检验时,都应有相关电性测试,以挑选出因静电而产生的不良品*n>
· <*n>在电路设计时,应考虑消除电涌对*n>LED<*n>危害的可能性*n><*n>.*n>
4.1.<*n>其它*n>Moisture Proof Package:
· <*n>如果超出规格书以外而进行使用时,出任何问题我们都将不承担责任*n> <*n>。*n>
· LED<*n>可以发出很强的足以伤害到眼睛的光,要注意****,不可过长时间用肉眼直视*n><*n>LED*n><*n>的光。在大量使用之前,应与我们交流,了解更详细的规格要求。*n>
· LED<*n>产品形状和规格如有改变,请恕不能及时相*n>告。