Complete PCB DFM(Design for Manufacturing) Manual - Page 1
Forum section: electronics / general

author: MelodyGong
author_rank: Newbie
timestamp: May 17, 2017, 09:32:17 am
content: Hi all,This is Melody from Seeed Studio Fusion team. I'm here to recommend a free PCB DFM manual for engineers especially for beginners.Here's the PDF download link:https://statics3.seeedstudio.com/fusion/ebook/PCB+DFM+V1.0+.pdfThis specification defines the design parameters for PCB design from a DFM point of view, including the shape,lamination construction, Fiducial design, component layout, conductive traces, holes, solder mask, surfacetreatments, silk screen design, and so on. Many PCB design for manufacturing questions will be answered and some tricks will be revealed.There may be some incorrect spellings or vague expression in this manual, we really appreciate your feedback to help us improve the manual together. If you have any advice or suggestions, please contact us at fusion#seeed.cc[use @ to replace #]I'm not intend to spamming in this thread, i just want to share this manual to make it beneficial to the whole community

author: perieanuo
author_rank: Frequent Contributor
timestamp: May 17, 2017, 02:51:13 pm
content: Bad linkEnvoyé de mon iPad en utilisant Tapatalk

author: ar__systems
author_rank: Frequent Contributor
timestamp: May 17, 2017, 03:19:33 pm
content: worked for me

author: perieanuo
author_rank: Frequent Contributor
timestamp: May 17, 2017, 03:30:57 pm
content: Quote from: ar__systems on May 17, 2017, 03:19:33 pmI'm on iPad with Tapatalk retried after your posting it's not working...Don't know maybe is os dependent or Tapatalk browser misfiresEnvoyé de mon iPad en utilisant Tapatalk

author: perieanuo
author_rank: Frequent Contributor
timestamp: May 17, 2017, 05:16:23 pm
content: Confirmed, if opened with external browser it works with tapatalk browser don't I tested IPad and android tapatalk. Thanks!Envoyé de mon HUAWEI NXT-L29 en utilisant Tapatalk

author: DigitalDeath
author_rank: Regular Contributor
timestamp: May 18, 2017, 06:17:33 am
content: Hi Melody,In general it's a very good guide. The only suggestion would be to add mils to the specs next to the millimeter ones where there are only millimeter ones and mm ones next to the mil ones where only mil ones are shown. In the US we are used to a lot of mil standards like 5 mil spacing and such and elsewhere it's all mm.Other than that it looks really good and it'll help a lot of people.Thanks for posting it.

author: Mattylad
author_rank: Regular Contributor
timestamp: May 18, 2017, 10:05:06 pm
content: Better still, change it to both inch and millimeters instead of mil and mm - that way you cover thou too.You are mixing up your units very inconsistently.Question:#38 has 0 and 8 by gaps between components.Is this saying to have a zero gap? I cannot see where this is explained?Table 3 flows over 2 pages, this is not good as you lose the header - tables should be entirely on the same page if they can fit on one page.

author: endevor100
author_rank: Contributor
timestamp: May 19, 2017, 05:37:57 am
content: Overall a pretty good manual. I really like all the pictures explaining the meaning of various terms. I made a list of many relatively minor suggestions:Section 2.1 - need a space between “or.zip” in first paragraph.Section 2.1 - Note 2 uses (pcbname.TXT) and note 3 uses (pcb name.TXT) to describe the same file.Section 2.2 - For Minimum trace spacing / width element the spec is listed “For 1oz, 4/4mil, 5/5mil, 6/6mil” it is unclear what information 5/5mil and 6/6mil are trying to convey because 4/4mil is possible.Section 2.2 - Image for Circuit to edge shows >0.4mm not the >0.3 listed.Section 3.1 - “can be used can be used” in first sentence.Section 3.1 - Figure 2 label is difficult to understand. My suggestion for easier reading: “Figure 2: Necessary PCB edge clearance for automatic board cutter.” Also the period is missing at the end of the sentence.Section 3.2 - Section  reads “between the origins” but “between the centers” would make more sense.Section 3.2 - In Figure 5 it looks like “mm” has been replaced with “RR” in several measurements.Section 3.3 - Section  reads “cell board size less than” seems like you’re missing word “cell board size is less than” would make more sense.Section 3.3 - In Figure 7 & 8 random “Ae” before the word CUT. Seems like it should be removed.Section 3.3 - In Figure 10 arrow reads “Can be Ve CUT if the edge of the board is XYWGOMNY”. I can guess that the first part is supposed to read V CUT but I have no idea what the last word is supposed to be.Section 3.3 - Section  reads “If the SMD of cell board both sides” I think it would be better if it said “If the SMD components on both sides of cell board”.Section 3.3 - Note after Section  reads “if the second layer is the negative power / ground plane, then the third layer must also be negative.” Should probably be “if the second layer is the negative power / ground plane, then the third layer must also be negative power / ground plane.”Section 3.3 - In Figure 11 arrows read “after ROWWTW panelizing”. I don’t know what ROWWTW is supposed to mean, but it seems like it could be deleted.Section 3.4 - In Figure 13 “1/3a” seems like it should be “1/3” or “1/3G”.Section 4.1 - In Figure 14 the word in the arrow is “BOSd” should probably be “AIR” or something like that.Section 4.2 - In Figure 16 uses an “a” in the image and an “?” in the caption.Section 4.2 - Section  I think the last sentence is repeated information from the sentence before it and could be deleted.

author: bitseeker
author_rank: Super Contributor
timestamp: May 19, 2017, 06:15:28 am
content: Melody, it's great to see Seeed sharing and gathering feedback on documentation like this. Welcome to the forum.endevor100: Nice copy editing job. Way to go on your first forum post and welcome.

author: MelodyGong
author_rank: Newbie
timestamp: May 21, 2017, 02:43:00 pm
content: Thanks for all the great feedback everyone, special thanks to endevor100, you have a good eye for details.Our team is already working on version 1.1 and your feedback is proving very useful! Especially for the content, the Figures have a lot of errors when the files were converted so some of the text is incorrect. We are re-doing all of the figures and simplifying some of them so hopefully the next version will be out next month.Keep the feedback coming and thanks again!