IPC-A-600H-2010 中文版 印制板的可接受性 (1).pdf - 第55页

印制板上的标 记 信息 (部件 代 码 ) 应当 是 永久 性的, 应当 能 经 受 住 所规定的印制板 环境 测试和 清 洗 程 序 。标 记 在本文件要求的范 围 内 应当 是 清 晰 可 读 的。印制板 应当 在不大于 2 倍 的 放 大 倍数 下进行检验。当采用 导电油 墨 时,它 们 应该 满 足 IPC-6010 系列规范 的要求。 本节( 包括 激 光、标 签 、条 形 码 等)规定了所有标 记 的通用要求,并对下列类 型…

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The marking information on printed boards (part reference designations), shall be permanent and be capable of withstanding the environmen-
tal tests and cleaning procedures specified for the printed board. Marking shall be legible within the requirement of this document. The board
shall be inspected at no greater magnification than 2X. When conductive inks are used they should meet the specifications of the IPC-6010
series.
This section has general requirements for all marking (including laser, labels, bar coding, etc.) and specific criteria for the following types of
marking:
Etched Markings.
Screened or Ink Stamped Markings.
Unless otherwise specified, each individual printed board, each qualification board, each set of quality conformance test circuitry (as opposed
to each individual coupon) is marked in accordance with the procurement documentation, with the date code and manufacturer's identifica-
tion (e.g., cage code for military, logo, etc.). The marking is produced by the same process as used in producing the conductive pattern, or by
use of permanent fungistatic ink or paint, or by vibrating pencil marking on a metallic area provided for marking purposes or a permanently
attached label. Conductive markings, either etched copper or conductive black ink are considered as electrical elements of the printed board
and should not reduce the electrical spacing requirements. All markings are to be compatible with materials and parts, legible for all tests, and
in no case affect board performance.
Although it is acceptable to use impression stamp markings on unused portions of panels, they are not allowed on finished printed boards.
Engraved marking or impression stamps and any mark that cuts into the laminate is handled in the same manner as a scratch.
2.8 MARKING(标记)
Introduction(引⾔(续)
46 IPC-A-600H-201020104
印制板上的标信息(部件应当永久性的,应当所规定的印制板环境测试和。标在本文件要求的范
应当的。印制板应当在不大于2倍数下进行检验。当采用导电油时,它应该IPC-6010系列规范
的要求。
本节(包括光、标、条等)规定了所有标的通用要求,并对下列类的标规定了特准则:
的标
印或盖印的标
有规定,每一的印制板、每一块鉴定测试板、每质量一性测试路(对于每附连
文件要求加标和制造商的识别(如用板的商业及政府机构代或商标等)。制造标可采用与生
导电相同的工,或采用永久性的有防性的可以作为提供标的目的采用表面上作标
永久性的标导电性标,不 的或色导电视为路的电气,它不应该电气间距的要
求。所有标要与材料、部件容,各种测试,并在任何情况下不可影响印制板的性能。
尽管在在制板的使用部分用印标是可接受的,但不允许用在品板上。刻式任何基板内的标均按划
样对
2.8
MARKING(标记)
Introduction(引⾔(续)
47IPC-A-600H-2010 20104
An etched marking is produced the same as the conductors on the printed board. As a result, the following criteria shall be met for etched
marking:
的制作和印制板上的体制作是相同的。因此,应当符合下列要求。
Target Condition - Class 1,2,3(⽬标条件 - 1,2,3级)
Characters are legible.
Minimum conductor spacing requirements have also been main-
tained between etched symbolization and active conductors.
字符均清
字符和有体之小导间距要求。
Acceptable - Class 3(可接受条件 - 3级)
Marking defects regardless of cause, (i.e., solder bridging, over-
etching, etc.) as long as characters are legible.
Marking does not violate the minimum electrical clearance limits.
Edges of the lines forming a character may be slightly irregular.
在字符的情况下,标缺陷(例如、过
等)可接受。
反最小电气间要求。
字符的线条边缘可以微的不规则。
Acceptable - Class 2(可接受条件 - 2级)
Marking defects regardless of cause, (i.e., solder bridging, over-
etching, etc.) as long as characters are legible.
Marking does not violate the minimum electrical clearance limits.
Width of the lines forming a character may be reduced by up to
50%, providing they remain legible.
在字符的情况下,标缺陷(例如、过
等)可接受。
反最小电气间要求。
字符的的线条宽度50%要线条仍可
281a
281b
2.8 MARKING(标记)
2.8.1 Etched Marking(蚀刻标记)
48 IPC-A-600H-201020104