屏蔽罩夹子应用设计指导.pdf

POCONS CO。,LTD SHIELD CAN CLIP ENGINEERINGSHIELD CAN CLIP ENGINEERING GUIDEGUIDE屏蔽罩夹子应用设计指导屏蔽罩夹子应用设计指导2011。03 vShield Can Clip (PTC Series)［Major Application ］- Cellular Phone- PMP- WIBRO USB DONGLE- GPS MODULE- NAVIGATION- HSUPA / HSDPA module- MP4-- PONPON- HIPASS- UMPC［Key Features ］ Efficient use of the PCB space To increase productivity by mounting the Clip automatically Reduction in the term and the expense for the developmentby removing the frame Cost reduction Efficient purchase by standardization Easy repairs Pocons中国区代理 速盈科制作2vApplication exampleShield Can ClipShield Can ClipEmbossingHOLEEmbossing Clip Pocons中国区代理速盈科制作3vAppilcation notel Big size shield can which cover whole PCB had better separate to 2 pieceof shield can。

l The minimum gap size between clip and clip is 0。3mm。l The clip pad keeps 0。5mm distance from PCB edge。l Clip should be separated from Magnetic strip components as far as possible。l When the gap size between shield Can and plastic cover is less than0。2mm, it is perfect for drop test。0。2mm,it is perfect for drop test。 Pocons中国区代理 速盈科制作4vUnderfilll When you artwork clip at near memory chipl 1) in case of sealing with “resin”屏蔽罩夹子, keep 0。4mm distance from ICl 2) in case of no sealing, 0。15~0。2mm distance from IC is enoughl * Sealing with Resin,l they call “ underfill” for protecting memory on drop test Pocons中国区代理 速盈科制作5vClip placementCase 1) when designing PCB with 4 pcs of clipDo not place the clip at the center position。

Because it is not perfect for drop test andinserting shield can by manual。Recommended placement)It is good for assembly and drop testIt is good for assembly and drop test Pocons中国区代理 速盈科制作6vClip placementCase 2) artworkwith 6 pcs of clipCase 3) artwork with 10pcs ofclip especially in RF partMore clip is better for EMI shielding Pocons中国区代理 速盈科制作7 vClip application noteCase 4) With screwWhen designing PCB with big shield can, you can use clip andscrew at the same timeScrew hole Pocons中国区代理 速盈科制作8 vShield Can design referenceWhen you use our clip, you’d better cut out 0。

27~0。30mm height, 7mmlength of can(refer to the drawing below) which is part of clip and cancontacted Pocons中国区代理 速盈科制作9 vApplication ezxample for base bandAs you can see,you can use the PCB space efficiently in base band part。 Pocons中国区代理 速盈科制作10 vclip placement Guide considering Noise emmissionClip should be placed within 20mm distance not to affect the wireless sensitivity- If shield can side length is less than 20mm屏蔽罩夹子, then clip should be placed at center。- When you consider assembly, clip should be placed within 5mm distance fromcorner。

- Clip should be placed at shortest distance from hot spot。WithoutWithoutFrame typeFrame typeCLIPSHIELD CANSHIELD CANGSM850110dBuV93dBuV90dBuVPCS105dBuV80dBuV82dBuV according to the evaluation result, both have same shield effectiveness。 Pocons中国区代理 速盈科制作11vAppendixITEMSPECMethodResult- More than 3 kgfPCBPeeling strengthGage- Max : 5。2 kgf(Lateral force)Clip- Min : 4。2 kgf- AVG : 4。6 kgfPushFlexural Strength - Do not drop outGood(Twist test)(twist 1mm)-Insertion force- Insertion force: 420 gInsertion/Rete: less than 1,000g- measure the force after 10ntion forcecycles(inserting and pulling out)-retention force- retention force( Can Thickness : 0。

2T ): 118 g: more than 60g- Max : 34 mContact resistance - 100 m Max- After inserting shield Can- Min : 26 m- AVG : 30 m Pocons中国区代理 速盈科制作12vAppendix Pocons中国区代理 速盈科制作13

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