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…

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-20102010年4月

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,并对下列类型的标记规定了特殊准则:
• 蚀刻的标记
• 网印或盖印的标记
除非另有规定,每一块单独的印制板、每一块鉴定测试板、每套质量一致性测试电路(相对于每块单独的附连板而言)均要按照
采购文件要求施加标记,包含有日期码和制造商的识别标记(如军用板的商业及政府机构代码或商标等)。制造标记可采用与生
产导电图形相同的工艺,或采用永久性的有防霉性的油墨或油漆,也可以作为提供标记的目的而采用电笔在金属表面上作标记,
或者贴附永久性的标签。导电性标记,不管是铜 蚀 刻 的或黑色导电性油墨均视为电路的电气要素,它不应该降低电气间距的要
求。所有标记都要与材料、部件相兼容,经各种测试后仍清晰可读,并在任何情况下都不可影响印制板的性能。
尽管在在制板的未使用部分用压印标记是可接受的,但不允许用在成品板上。雕刻式、压印式等任何切入基板内的标记均按划伤
同样对待。
2.8
MARKING(标记)
Introduction(引⾔(续))
47IPC-A-600H-2010 2010年4月

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:
蚀刻标记的制作和印制板上的导体制作是相同的。因此,蚀刻标记应当符合下列要求。
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.
• 每个字符均清晰可辨。
• 蚀刻字符和有源导体之间保持最小导体间距要求。
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.
• 在字符清晰可辨的情况下,标记缺陷(例如焊料桥连、过度
蚀刻等)均可接受。
• 标记不违反最小电气间隙要求。
• 形成字符的线条边缘可以呈现轻微的不规则。
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.
• 在字符清晰可辨的情况下,标记缺陷(例如焊料桥连、过度
蚀刻等)均可接受。
• 标记不违反最小电气间隙要求。
• 形成字符的的线条宽度可减少50%,只要线条仍可辨识。
图281a
图281b
2.8 MARKING(标记)
2.8.1 Etched Marking(蚀刻标记)
48 IPC-A-600H-20102010年4月