CN105682359A - 一种pcb及其表面贴装工艺 - Google Patents

一种pcb及其表面贴装工艺 Download PDF

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Publication number
CN105682359A
CN105682359A CN201610040866.4A CN201610040866A CN105682359A CN 105682359 A CN105682359 A CN 105682359A CN 201610040866 A CN201610040866 A CN 201610040866A CN 105682359 A CN105682359 A CN 105682359A
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China
Prior art keywords
pcb
mounted component
surface mount
parts
mount components
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冯俊谊
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00Printed circuits
    • H05K1/18Printed circuits structurally associated with non-printed electric components
    • H05K1/181Printed circuits structurally associated with non-printed electric components associated with surface mounted components
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/30Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/34Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
    • H05K3/341Surface mounted components
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09Shape and layout
    • H05K2201/09209Shape and layout details of conductors
    • H05K2201/09372Pads and lands
    • H05K2201/09427Special relation between the location or dimension of a pad or land and the location or dimension of a terminal

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Electric Connection Of Electric Components To Printed Circuits (AREA)

Abstract

本发明涉及PCB技术领域,特别涉及一种PCB及其表面贴装工艺,一种PCB,PCB尺寸加工公差为±0.1mm,PCB上表贴元器件焊盘加工公差为±0.05mm,PCB上表贴元器件焊盘的大小为表贴元器件管脚尺寸的100%-110%,PCB采用拼版V-CUT设计,并加螺纹孔处理,所述表贴元器件是芯片,所述表贴元器件是灯光器件,所述PCB开模制作,一种PCB表面贴装工艺,印刷机钢网开口为四分之一开口,并外延0-10%,再结合和利用锡膏融化瞬间把表贴元器件在焊盘上拉正的特性,本发明的有益效果是,实现了表贴元器件位置尺寸公差为±0.15mm的高精密PCB的设计和制作,确保了它的品质,并保证表贴元器件的焊接标准复合IPC610要求。

Description

一种PCB及其表面贴装工艺
技术领域
本发明涉及PCB技术领域,特别涉及一种PCB及其表面贴装工艺。
背景技术
PCB中文名称为印制电路板,又称印刷电路板,一个完整的PCB制作流程是:PCB设计、裸板制作、再经过表面贴装技术焊接,表面贴装技术也称SMT(SurfaceMountedTechnology),SMT的流程是印刷机使用钢网对裸板印锡膏、贴片机表贴元器件、回流焊焊接,在实际生产和生活中,PCB按设计和加工精度分类,分为普通PCB和高精密PCB,对于高精密PCB而言,其表贴元器件的位置尺寸要求公差为±0.15mm,甚至更小,例如,汽车灯光控制板就属于这种高精密PCB,它要求控制芯片距PCB板边的距离为10.85±0.15mm,这种高精密PCB,其设计和加工难度都大大增加,众所周知,PCB厂家能做到的PCB尺寸公差为±0.1mm,PCB焊盘的加工公差为±0.05mm,贴片机的贴片位置尺寸公差为±0.025mm至±0.05mm,印刷机的印刷位置尺寸公差为±0.025mm,根据尺寸链计算,这样叠加的公差为±0.2mm至±0.25mm,从理论上讲无法满足贴装后器件精度公差达到0到±0.05mm公差要求,这就是难点,导致所有制造企业不能制造这样的高精密PCB贴装。
发明内容
本发明需解决的问题是提供一种新的PCB及其表面贴装工艺,以保证高精密PCB的设计和制作。
为解决上述问题,本发明采取的技术方案是:提供一种PCB及其表面贴装工艺:
一种PCB,PCB尺寸加工公差为±0.1mm,PCB上表贴元器件焊盘加工公差为±0.05mm,其特征在于,PCB上表贴元器件焊盘的大小为表贴元器件管脚尺寸的100%-110%,PCB采用拼版V-CUT设计,并加螺纹孔处理。
所述表贴元器件是芯片。
所述表贴元器件是灯光器件。
所述PCB开模制作。
一种PCB表面贴装工艺,其特征在于,印刷机钢网开口为四分之一开口,并外延0-10%,再结合和利用锡膏融化瞬间把表贴元器件在焊盘上拉正的特性。
本发明的有益效果是,实现了表贴元器件位置尺寸公差为±0.15mm的高精密PCB的设计和制作,确保了它的品质,并保证表贴元器件的焊接标准符合IPC610要求。
具体实施方式
为了便于本领域技术人员的理解,下面将结合具体实施例对本发明所述的PCB及其表面贴装工艺作进一步详细描述。
一种PCB,汽车灯光控制板,PCB尺寸加工公差为±0.1mm,PCB上表贴元器件焊盘加工公差为±0.05mm,PCB上表贴元器件焊盘的大小为表贴元器件管脚尺寸的100%-110%,PCB采用拼版V-CUT设计,并加螺纹孔处理,该表贴元器件指的是灯光控制芯片,PCB开模制作,印刷机钢网开口为四分之一开口,并外延0-10%,再结合和利用锡膏融化瞬间把表贴元器件在焊盘上拉正的特性,设备的精度公差完全靠PCB的可制造性设计、钢网的可制造性开口、印刷机的参数来保证,这样,就保证了灯光控制芯片距PCB板边的位置尺寸公差为±0.15mm,确切讲灯光控制芯片距离PCB板边10.85±0.15mm,该PCB上的表贴元器件的焊接标准符合IPC610的要求。

Claims (5)

1.一种PCB,PCB尺寸加工公差为±0.1mm,PCB上表贴元器件焊盘加工公差为±0.05mm,其特征在于,PCB上表贴元器件焊盘的大小为表贴元器件管脚尺寸的100%-110%,PCB采用拼版V-CUT设计,并加螺纹孔处理。
2.根据权利要求1所述的一种PCB,其特征在于,所述表贴元器件是芯片。
3.根据权利要求1所述的一种PCB,其特征在于,所述表贴元器件是灯光器件。
4.根据权利要求1所述的一种PCB,其特征在于,所述PCB开模制作。
5.一种PCB表面贴装工艺,其特征在于,印刷机钢网开口为四分之一开口,并外延0-10%,再结合和利用锡膏融化瞬间把表贴元器件在焊盘上拉正的特性。
CN201610040866.4A 2016-01-18 2016-01-18 一种pcb及其表面贴装工艺 Pending CN105682359A (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110099521A (zh) * 2019-06-05 2019-08-06 深圳市南极光电子科技股份有限公司 一种fpc与pcb灯条的焊接方法及pcb灯条

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63268286A (ja) * 1987-04-27 1988-11-04 Matsushita Electric Ind Co Ltd 面実装部品
CN1849728A (zh) * 2003-09-09 2006-10-18 3M创新有限公司 互连系统
CN202032491U (zh) * 2011-03-23 2011-11-09 李家骥 一种led低热阻免焊接安装结构及采用此结构的led灯具
CN103037633A (zh) * 2012-12-13 2013-04-10 无锡江南计算技术研究所 表面贴装器件防焊接偏移方法
CN105234517A (zh) * 2015-10-31 2016-01-13 成都海沃斯电气技术有限公司 双面pcb板透焊孔焊接透锡方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63268286A (ja) * 1987-04-27 1988-11-04 Matsushita Electric Ind Co Ltd 面実装部品
CN1849728A (zh) * 2003-09-09 2006-10-18 3M创新有限公司 互连系统
CN202032491U (zh) * 2011-03-23 2011-11-09 李家骥 一种led低热阻免焊接安装结构及采用此结构的led灯具
CN103037633A (zh) * 2012-12-13 2013-04-10 无锡江南计算技术研究所 表面贴装器件防焊接偏移方法
CN105234517A (zh) * 2015-10-31 2016-01-13 成都海沃斯电气技术有限公司 双面pcb板透焊孔焊接透锡方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110099521A (zh) * 2019-06-05 2019-08-06 深圳市南极光电子科技股份有限公司 一种fpc与pcb灯条的焊接方法及pcb灯条

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