abstain-贫嘴
IPC-A-6
10
国际标准中英文对照
4.6.2 Heat sink-Contact
散热片<
/p>
――
接触片
arget-Class 1,2,3
目标——等级
1,2,3
· Component and heatsink are in
full contact with the
mounting surface.
组件和散热片与安装表面完全
接触
· Hardware meets specified
attachment requirements.
部件满足规定的接触要求。
Figure
图
4-64
1. Heat sink
散热片
Acceptable-Class 1,2,3
可接受的
——等级
1,2,3
· Component not flush.
组件不平齐
· Minimum
75% contact with
mounting surface.
至少有
75%
与安装表面接触
·
Hardware
meets
mounting
torque
requirements if
specified.
如果有规定,部件满足安装的转距要求
Figure
图
4-65
1. Gap 2. Heat sink
间隙
散热片
Defect-Class
1,2,3
缺点——等级
1,2,3
· Component is not in
contact
with mounting surface.
组件没有接触到安装表面
·
Hardware is loose and can be
moved.
部件松弛可以移动。
Figure
图
4-66
1. Heat sink 2. Gap
散热片
间隙
5.1
Orientation
方向
5.1.1 Orientation-Horizontal
方向——水平
Target-
Class 1,2,3
目标——等级
1
,
2
,
3
?Components are centered
between their lands.
组件位于焊盘中央
?Component markings are
discernible.
组件标识清晰可见
?Nonpolarized components are
oriented so that
markings
all read the same way (left-to-right
or
top-to-bottom).
Figure
图
5-1
无极性组件的方向应使其标识
都能按同样方式进行辨识
(从左到右或从上到下)
Acceptable-
Class 1,2,3
可接受的——等级
1
,
2
,
3
?Polarized and multilead
components are oriented
correctly.
有极性和多引脚的组件应按正确
方向安装。
?When hand
formed and
hand-inserted, polarization
symbols are discernible.
当手工成型及手插件时,极性符号可以辨识。
?All components are as specified and
terminate to
Figure
图
5-2
correct lands.
所有组件都符合规定并连接到
正确的焊盘上。
?Nonpolarized
components
do
not
need
to
be
oriented
so
that
markin
gs
all
read the same way(left-to right or top
to-bottom).
无极性的组件不需要按同样的方向,
只要标识可按相同方向辨识即可
(从左到右
或从上到下)
.
5.1.1 Orientation-
Horizontal(cont.)
方向——水平(续)
Defect-Class 1,2,3
缺点——等级
1
,
2
,
3
?Component is not as specified
(Wrong part).
组件不符合规定(组件错误)
?Component not m
ounted in
correct holes.
组件没有安装在正确的孔中。
?Polarized component mounted
backwards.
有极性组件安装方向相反。
?Multileaded component not oriented
correctly.
Figure
图
5-3
多引脚组件的安装方向不正
确。
5.1.2 Orientation-Vertical
方向——垂直
Target-
Class 1,2,3
目标——等级
1
,
2
,
3
?Nonpolarized component
markings read from the top
down.
无极性组件的标识可以从上至
下辨识
?Polarized markings are
located on top.
极性标识位于顶部
.
Figure
图
5-4
Acceptable-Class 1,2,3
可接受的——等级
1
,
2
,
3
?Polarized part is mounted with a long
ground lead.
极性组件安装时有长的接地引脚
?Polarized marking hidden.
极性标识被隐藏起来
?Nonpolarized component markings read
from bottom to
top.
无极性组件标识可以从底至上辨识。
Figure
图
5-5
Defect-Class 1,2,3
缺点——等级
1
,
2
,
3
?Polarized
component
is
mounted
backwards.
极性组件安装反向。
Figure
图
5-6
5.2 Mounting
安装
5.2.1
Mounting-Horizontal-Axial Leaded-Supported Holes <
/p>
安装——水平——轴向引脚——有
支撑孔
Target-Class 1,2,3
目标——等级
1
,
2
,
3
?The entire body length of the
component is in
contact with
the board
surface.
整个组件本体长度与
线路板表面
完全接触
?Components required to be mounted off
the board are ,at
least
1.5mm[0.059 in]from the board surface;
e.g., high heat dissipating.
需要离开线路板表面安装的组件至少要离开线路板
Figure
图
5-7
平面
1.5mm
(
0.059
in
)
,如高散热<
/p>
器件
.
Figure
图
5-8