IPC-A-600H-2010 中文版 印制板的可接受性 (1).pdf - 第54页
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 …
This section covers acceptability criteria for marking of printed boards. Marking of printed boards provides a means of identification and aids
in assembly. Legends screened over metal will generally degrade in a solder process or stringent cleaning environments. Legends over metal
are not recommended. When use of legends over solderable surfaces is required, an etched legend is target condition. Minimum requirements
should be specified on the procurement documentation. Examples of the marking addressed by this section are:
• Assembly or fabrication part numbers when a requirement of the procurement documentation. Each individual board, each qualification
board, and each set of quality conformance test circuitry (as opposed to each individual coupon) shall be marked in order to ensure trace-
ability between the boards/test circuitry and the manufacturing history and to identify the supplier (logo, etc.).
• Component insertion locators, when a requirement of the procurement documentation.
• Manufacturing sequence number when required by the work order.
• Revision letter when the part number is a requirement of the procurement documentation.
• Designator for test points or adjustment points.
• Polarity or clocking indicators.
• U.L. designator.
The procurement documentation (artwork) is the controlling document for location and type of marking. The procurement documentation
revision letter to which the printed board is fabricated shall be marked on the board if part number marking is a requirement of the procure-
ment documentation. Marking on printed boards shall withstand all tests, cleaning and compatible processes to which the printed boards are
subjected and shall be legible (capable of being read and understood) as defined by the requirements of this document. If a conductive mark-
ing is used, the marking shall be treated as a conductive element on the printed board and shall conform to IPC-4781.
本节涵盖了印制板标记的可接受性准则。印制板的标记提供了识别的方法并在组装时提供帮助。网印在金属表面上的字符，通常
会在焊接过程中或严酷的清洗之后变质。因此，不建议在金属表面上印字符。当需要在可焊表面制作字符时，蚀刻字符为目标条
件。应该在采购文件中规定最低要求。本节所涉及的标记示例如下：
• 采购文件中要求的组装或制造部件号。每一块单独板、每一块鉴定测试板及每套质量一致性测试电路（相对于每块单独的附连
板）均应当标识，以便追溯板/测试电路及制造历史，并识别供应商（商标等）。
• 采购文件中要求的元器件插装位置。
• 加工单中要求的制作顺序号。
• 采购文件中要求的部件号的版本字符。
• 测试点或调节点的指示符号。
• 极性或方位的指示符号。
•U
L标志。
采购文件（照相底图）是规定标记位置和类型的控制文件。如果采购文件中要求标识部件号，则所制造的板上应当标记有该采
购文件的版本字符。印制板上的标记应当能够经受所有的测试、清洗，并与其它工艺制程相兼容，并按本标准要求规定，在经受
测试及有关制程后，板面上的标记应当仍可识别（能读出与理解）。当采用导电标记时，应当把标记作为印制板上的导电要素对
待，且应当符合IPC-4781。
图28a
2.8 MARKING（标记）
Introduction（引⾔）
45IPC-A-600H-2010 2010年4月
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