This presentation is the property of its rightful owner.
Sponsored Links
1 / 49

第 12 章 封装过程中的缺陷分析 PowerPoint PPT Presentation


  • 208 Views
  • Uploaded on
  • Presentation posted in: General

第 12 章 封装过程中的缺陷分析. 由于封装技术水平的不断提高以及封装元件轻薄短小的发展趋势,本来已存在于封装制作中的缺陷问题,显得更为突出重要了。为了提高产品的可靠性,了解封装缺陷问题的原因并加以改善,延长产品的使用寿命,避免封装缺陷的产生并提高封装产品质量,本章对封装过程中的缺陷进行分析和阐述。. 12.1 金线偏移 金线偏移是封装过程中最常发生的问题之一,集成电路元件常常因为金线偏移量过大造成相邻的金线相互接触从而形成短路( Short Shot ),甚至将金线冲断形成断路,造成元件的缺陷如图 12.1 所示。金线偏移的原因一般有以下几种:

Download Presentation

第 12 章 封装过程中的缺陷分析

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


12 5714977

12


12 5714977

12.1

Short Shot12.1

Viscous Drag ForceViscosity

Bending Moment


12 5714977

/Overpacking/Latepacking

2.5-250m25m

IC


12 5714977

12.1 X


12 5714977

12.2

12.2.1

1

112.2


12 5714977

12.2

25-612.3


12 5714977

12.3

2

12.4

PCB

PCBPCBPCBPCBPCBPCB

PCB


12 5714977

12.4

3


12 5714977

self alignmentPCB


12 5714977

ChipBGACSPChipChipBGABGASOPSOJQFPPLCCSOPSOJQFPPLCCSMD


12 5714977

4

112.5PCBPCBPCBPCB

12.5


12 5714977

PCB:

a.

b.

c.

d.

12.6ABGS


12 5714977

12.6

PCB

a. G


12 5714977

12.7 G

b.

12.8


12 5714977

2

3


12 5714977

4

Chip;SOPSOJQFPPLCC3/4


12 5714977

1/20.2mm0.1mm


12 5714977

12.2.2

1

PCB


12 5714977

12.9

12.9


12 5714977

2

1

2

a.

b.

c.

d.


12 5714977

3

a.STC

b.XY

c.

d.

Z

3


12 5714977

1

Sn/Pb/In/

2

3

4


12 5714977

12.2.3

12.10

12.10


12 5714977

1

1

9095

12.11


12 5714977

12.11

2


12 5714977

3

4

4150-16070s-90s

5


12 5714977

12.2.4

SMT

PCB


12 5714977

1

12.12


12 5714977

12.12

2


12 5714977

3

1


12 5714977

2

3

cartridge

T


12 5714977

4T

//TT

5

PCBT


12 5714977

6

50179183Sn62.5/Pb36.5/Ag1.0

183179

7

T

N2O2


12 2 5 1

12.2.5

1


12 5714977

2BGA

BGABGAXBGAXXBGAX

BGAIPG-7095BGABGAIPG-7095


12 5714977

3

BGABGABGAPCB

BGA


12 5714977

BGAPCBBGABGA63Sn/37PbBGA10Sn/90PbBGA302BGA


12 5714977

4

IPC-7.95/502510302510-25


12 2 6 1

12.2.6

1


12 5714977

2


12 5714977

3


12 5714977

4


12 5714977

5


12 5714977

6


12 5714977

7


12 5714977

8


12 5714977

9


12 5714977

10


12 5714977

11

X235PCBPCB


  • Login