"Are there some specification for the gap between component with the PCB surface?"  
 
  Do you mean the gap is component body to PCB surface or component lead to PCB surface? The component is SMD or PTH comp. ?
 For detailed description,you can refer to IPC-A-610D section 7 and section 8. The spec. is different for different component type.
  
 
________________________________

From: TGAsia [mailto:[log in to unmask]] On Behalf Of Timmy Ni
Sent: Wednesday, March 26, 2008 1:52 PM
To: [log in to unmask]
Subject: [TGA] 答复: [TGA] thickness of solder paste vs compontents soldering area



Thanks!

 

It is a component size, the soldering area has the same size but with the grid style. Are there some specification for the gap between component with the PCB surface?

 

Best Regards

Timmy Ni 

 

________________________________

发件人: TGAsia [mailto:[log in to unmask]] 代表 Cony Su
发送时间: 2008年3月26日 11:17
收件人: [log in to unmask]
主题: Re: [TGA] thickness of solder paste vs compontents soldering area

 

 

 

 I agree with what Peter said.  It's OK if soldering joint meet to quality requirement.  

 

 But I have one query:  "the soldering area is 50.7mm x 28mm"   Do you mean it is a pcb pad or a component size?  

 Usual there isn't such big pad. If it is component size,you don't care it.

 

 On stencil design standard,you can refer to IPC-7525.

 

________________________________

From: TGAsia [mailto:[log in to unmask]] On Behalf Of Peter Zhou
Sent: Tuesday, March 25, 2008 3:22 PM
To: [log in to unmask]
Subject: Re: [TGA] thickness of solder paste vs compontents soldering area


Hello, Timmy: 

There are no standard on solder paste's thickness. The thickness depends on the stencil thickness. If the stencil thickness is 6mil, you can define the solderpaste thickness scale and do SPC to track the print status. PE should define the stencil thickness by the component's feature, not quality guy. 

Best Regards   

Peter Zhou
Engineering Manager
Simclar Electronics (SuZhou) Co,. Ltd.
Block C#02-01/08, No.5 XingHan Street
SuZhou Industrial Park, 215021, SuZhou, P.R.China
Tel: +86 512 62521808 (Ext. 607)
Fax: +86 512 67618925
MP: 13913124061
E-mail: [log in to unmask]