Wednesday, September 25, 2013

Common Problems And Treatment To PCB Board Drilling Process - B

     As we know, there’re many steps for PCB board fabrication. During the process, drilling is one of the most important process, many problems may happen during the process. Here I make introduction on the main problems and relative treatment.

1、drilling bit broken---introduced before.
2、via damage
Root cause includes:
Taking the drill bit after broken; Drilling without aluminum or clamp the blank; Parameter error; Drill bit elongate; valid length of drill bit can’t meet the requirements of drilling pile layer thickness; Hand drilling; Burred caused because of special raw material.
(1) according to the previous problem, ruling out cause of knife breaking, make the right treatment.
2) aluminum and back plane perform as protection to the via, must be used during production, distinguish the available and unavailable back plane, put them at the same direction, need to be taken double check before using.
(3) before drilling, must check if the drilling depth is in accordance with the drilling bit, check parameters of every drill bit are set correctly.
(4) check the location of the drill bit is correct when drilling machine catching the drill bit, then start the machine, boot drill tip generally can not exceed the presser foot when machine start.
(5) Check the valid length of the drill bit by visual before put onto machine, and measure the fold number of the available working laminates.
(6) If the accuracy, rotate speed of hand drilling can’t meet the the requirement, manual drilling should be forbidden.
(7) When setting the parameters to special raw material, proper selection of parameters should be taken according to the situation of quality, feed should not be too fast.

3、via location offset
Root cause includes:In the process of PCB board drilling, bit location moved; Improper selection to material of cover plate, softness or hardness discomfort; harmomegathus to material cause the offset of via; improper use to the adopted setting tool;improper setting on presser foot, it hit the pin and lead the remove of working laminates;resonance happen during the working to drill bit;Collect chuck not clean or damaged;slid caused by the touching of drill bit to cover plate during running; no pin; different base point; tape not sticked firmly; movement deviation happen to the Drilling machine's X, Y axis; problem with procedure.

Solution to problem 3 will be introduced in next document.

Common Problems And Treatment To PCB Board Drilling Process - A

  As we know, there’re many steps for PCB board fabrication. During the process, drilling is one of the most important process, many problems may happen during the process. Here I make introduction on the main problems and relative treatment.
1、drilling bit broken
Root cause includes:Excessive spindle deflection; wrong operation taken by operator during drilling; Not appropriate choosing to drilling bit;insufficient rotate speed to drill bit;Laminated layer too much;Debris between plate and plate or under plate;the depth of the drilling spindle too deep cause poor chip removal; Amounts of drill tip grinding and super life use; Cover scratches crease, plate bending uneven; Fixed base board tape too wide or flat aluminum, plank is too small; Feeding speed is too fast compression; Improper operation during hole filling; Under the cover plate aluminium serious plugging ash; Welding the center of the drill tip pointed and drill tip handle deviation in the center.
  (1) Notice the part to repair the spindle, ore change for better spindle
  (2) A、Check whether there is stress beriberi pipeline jam
  B、Adjust the pressure of the foot according to the situation of the drill bit, check the pressure data of the foot when pressing, the normal is 7.5 kg;
  C、Check the spindle speed variation and whether there is copper wire inside the clamp mouth uniformity which may impact speed
  D、Check the spindle speed variation and the stability of the main shaft.
  E、Carefully adjust the pressure between the feet and bit, drill tip pointed not show presser foot, allowing only the tops of drill within the presser foot 3.0 mm
  F、Test the parallel degree of mesa drilling and stability
(3) check the geometry shape of drill bit, wear and use chip back slot length appropriate drilling bit.
(4) select the appropriate amount of feed, reduce feed rate.
(5) reduce to the appropriate number of laminated.  
(6) when the upper plate clean surfaces and under the cover of sundry, keep the surface clean.
(7) adjustment notification machine spindle drilling depth, maintain good drilling depth. (normal to control the depth of the hole in the 0.6 mm shall prevail.)
(8) number control grinding (wi) or in accordance with the parameters in the table Settings.
(9) choose suitable surface hardness, flat cover and plate.
(10) carefully check the status of tape fixed and width, replace the cover plate aluminium sheet, check the size.
(11) decrease the feed rate.
(12) operation should pay attention to the correct hole location.
(13) A, check the height of presser foot and presser foot exhaust slot is normal;

In next comment. Will introduce other problem which may usually happen during drilling.

Thursday, September 5, 2013

Wonderful PCB(HK) Limited. NON-Disclosure Agreement

This Mutual Non-Disclosure Agreement (the “Agreement”) is made and entered into as of May 14th.,  2012 between Wonderful PCB(HK) Ltd.,  a PCB corporation located at  32 A, Building No. 1, XianDaiHuaTing, ChuangYe Road, NanShan District, ShenZhen, China. and -----xxxxxxx having its principal place of business at ********.
1.  Purpose.  The parties wish to explore a business opportunity of mutual interest and in connection with this opportunity, each party may disclose to the other certain confidential technical and business information which the disclosing party desires the receiving party to treat as confidential.

2.  “Confidential Information” means any information disclosed by either party to the other party, either directly or indirectly, in writing, orally or by inspection including, without limitation, documents; prototypes; software and software documentation; ideas and concepts; samples; plant and equipment; technical specifications; financial, marketing and business plans; operating procedures, organization charts and lists of personnel; customer lists; product plans; and all similar information.  Confidential Information shall not, however, include any information which (i) was publicly known and made generally available in the public domain prior to the time of disclosure by the disclosing party; (ii) becomes publicly known and made generally available after disclosure by the disclosing party to the receiving party through no action or inaction of the receiving party; (iii) is already in the possession of the receiving party at the time of disclosure by the disclosing party as shown by the receiving party's files and records immediately prior to the time of disclosure; (iv)is independently developed by the receiving party without use of or reference to the disclosing party's Confidential Information, as shown by documents and other competent evidence in the receiving party's possession; or (v) is required by law to be disclosed by the receiving party, provided that the receiving party gives the disclosing party prompt written notice of such requirement prior to such disclosure and assistance in obtaining an order protecting the information from public disclosure.

3.  Non-use and Non-disclosure.  Each party agrees not to use any Confidential Information of the other party for any purpose except to evaluate and engage in discussions concerning a potential business relationship between the parties.  Each party agrees not to disclose any Confidential Information of the other party to third parties or to such party's employees, except to those employees of the receiving party who are required to have the information in order to evaluate or engage in discussions concerning the contemplated business relationship.  Neither party shall reverse engineer, disassemble or decompile any prototypes, software or other tangible objects which embody the other party's Confidential Information and which are provided to the party hereunder.

4.  Maintenance of Confidentiality.  Each party agrees that it shall take reasonable measures to protect the secrecy of and avoid disclosure and unauthorized use of the Confidential Information of the other party.  Without limiting the foregoing, each party shall take at least those measures that it takes to protect its own most highly confidential information and shall ensure that its employees who have access to Confidential Information of the other party have signed a non-use and non-disclosure agreement in content similar to the provisions hereof, prior to any disclosure of Confidential Information to such employees.  Neither party shall make any copies of the Confidential Information of the other party unless the same are previously approved in writing by the other party.  Each party shall reproduce the other party's proprietary rights notices on any such approved copies, in the same manner in which such notices were set forth in or on the original.

5.  No Obligation.  Nothing herein shall obligate either party to proceed with any transaction between them, and each party reserves the right, in its sole discretion, to terminate the discussions contemplated by this Agreement concerning the business opportunity.


7.  Return of Materials.  All documents and other tangible objects containing or representing Confidential Information which have been disclosed by either party to the other party, and all copies thereof which are in the possession of the other party, shall be and remain the property of the disclosing party and shall be promptly returned to the disclosing party upon the disclosing party's written request.

8.  No License.  Nothing in this Agreement is intended to grant any rights to either party under any patent, mask work right or copyright of the other party, nor shall this Agreement grant any party any rights in or to the Confidential Information of the other party except as expressly set forth herein.

9.  Term.  The obligations of each receiving party hereunder shall survive until such time as all Confidential Information of the other party disclosed hereunder becomes publicly known and made generally available through no action or inaction of the receiving party, but in no event shall the term for any Confidential Information disclosed under this Agreement exceed five (5) years from the date of initial disclosure.

10.  Remedies.  Each party agrees that any violation or threatened violation of this Agreement may cause irreparable injury to the other party, entitling the other party to seek injunctive relief in addition to all legal remedies. The parties agree that in the event of a dispute arising under or related in any way to this Agreement, the non-prevailing party shall pay all costs and expenses,  including reasonable  attorneys'  fees,  that may  arise or  accrue  from  enforcing  this Agreement, obtaining an interpretation of any provision of this Agreement, or in pursuing any remedy provided by applicable law whether such remedy is pursued or interpretation is sought by mediation, arbitration, the filing of a lawsuit, an appeal, and/or otherwise.

11.  Miscellaneous.  This Agreement shall bind and inure to the benefit of the parties hereto and their successors and assigns.  This document contains the entire agreement between the parties with respect to the subject matter hereof, and neither party shall have any obligation, express or implied by law, with respect to trade secret or proprietary information of the other party except as set forth herein.  Any failure to enforce any provision of this Agreement shall not constitute a waiver thereof or of any other provision.  This Agreement may not be amended, nor any obligation waived, except by a writing signed by both parties hereto.
WONDERFUL PCB(HK) Ltd.                  xxxxxxx
Signature: __________________                  Signature: ________________   
Date: __________________              Date: _________________
Company Chop:  _________________         Company Chop:  _________________

Tuesday, September 3, 2013

Wonderful PCB Prototype Tips

Constructing a PCB prototype is really a job very greatest left to pros, as it specifications to become carried out in accordance to exact specs. Any errors in the course of the prototyping stage could possess a cascading result on your PCB boards and things through the production run. Taking your designs to a specialist PCB manufacturing firm which can accurately create your prototype can get rid of errors that will expense worthwhile time and cash. Following are the issues which you ought to assume from a respected firm that builds prototype circuit boards:

PCB style and manufacturing businesses present solutions for versatile as nicely as rigid printed prototype circuit boards. The strategy ought to ideally commence using a expert overview of one's files for style and style for manufacturer capability. This signifies that your merchandise will be created a whole lot far more manufacture-capable by addressing a variety of feasibility and performance aspects. Your files will also be reviewed for excellent good quality supplies and swift turnaround. Rushing a file assessment will not be the really finest organization practice. It really is most effective to pick a firm that assures a thorough critique even if it takes longer. Checking for challenges at an early stage assures that no time is wasted through the vital phases.

Wonderful PCB is often a skilled PCB prototype manufacturer in Shenzhen China. It can provide thorough service including checking your Gerber file, give suitable suggests according to your style, analyze your design, manufacture, packing and excellent after-sale service! Wonderful PCB would be the provider that you simply will need. It might assist with trouble shooting, redesigning, or making variations from the very same circuit. These value-additional solutions are what distinguish mediocre makers from expert firms.

We right here provide some suggestions when make PCB prototype!

1). Verify the hole and pad diameters of plated-through VIAS. When you want a 12-mil-diameter plated-through hole, as an example, a printed circuit board vendor will probably drill a 17-mil hole and the internal plating will decrease the hole to 12 mils. But drills usually do not normally hit dead center. To ensure you still have enough pad area in the leading and bottom in the hole, make the pad diameter 10 mils bigger than the drill size. If tight spacing prevents beefing up the pad diameter, try to use a smaller hole. In all instances, you'd like a large enough annular ring of copper on both sides on the board to make sure excellent conductivity by way of the Via.4 layer BGA PTH holes unplugged immersion gold 3u" and black solder mask

2). Generating diameters of openings within a solder mask is advisable. 5 Mils are larger than their linked pads. The bigger opening helps make sure the solder mask does not encroach around the electrical pad.

3). Anytime possible, set your circuit board layout software to "flash" pads instead of draw them. A flashed pad exists as a single geometric entity although a drawn pad comprises several lines utilized to fill an location. The latter markedly increases the size of Gerber files and may bring about production complications.

4). Give PCB vendors comprehensive "contact" details. Supply detail contact details if you need a speedy response.

5). Generally include things like an accurate board outline on a minimum of 1 layer; also clearly show any slots or cutouts on this layer. Vendors can use this facts to create routing and scoring programs, which saves money and time.

6). Circuit boards designers should endeavor to keep traces and pads a minimum of 20 mils from their PCB edges. Board-dimension tolerances of ±5 mils are common, and also you don't want traces reduce or damaged during production. PCB fast prototyping maker will look in the PCB traces and pads and if attainable try to move them slightly away from edges.But with some layouts, that is not possible.