Choosing a PCB Printing Solution

The electronics Printed Circuit Board marketplace is evolving as new output systems develop into obtainable at minimal price tag. Immediate electronic printing is building inroads into the standard photolithography and display printing procedures that have been utilized to manufacture PCB for the past 20 decades.

Right here we will target on the use of immediate electronic printing to individualize PCBs just prior to their assembly. The target is to print a one of a kind mark on every single board that can be utilized to recognize the board. The mark have to be lasting and will almost certainly have 1D or Second device readable codes alongside with alpha numeric figures. The marks have to have a 600 DPI (dots for each inch) resolution or superior because of to measurement constraints on the PCB. We will also target on programs that need far more that one,000,000 boards for each calendar year. At these volumes automatic product managing starts off to develop into pretty significant to the in general achievement of the method.

Large quantity PCB fabricators use display printing with thermally remedied ink to print the legends that address every single aspect of the board. At this time electronic printing can not print the total aspect of a board at a price tag that competes with display printing. Even however quite a few printers, which includes the PPS7000, could print all the nomenclature on the board, below we will target on applying electronic printing only to print the individualizing marks.

Various individualizing selections exist which includes the pursuing:

Preprinted Label Software

Lots of minimal quantity merchandise start out with labels printed on business office products and hand used to every single PCB prior to or right after assembly. As the merchandise volumes ramp the dependability and price tag of hand making use of labels gets a issue. Automatic devices that print and use labels are obtainable. (see this site ) Due to the fact of PCB place constraints these devices have to spot labels pretty correctly, a major issue for quite a few label software devices. The labels are not lasting. At superior volumes the labels are far more pricey than other marking approaches.

Benefits

  • Small First Price tag
  • Large Distinction Mark

Cons

  • Not Lasting
  • Increased Incremental Price tag
  • Hard to Adjust Label Dimension On The Fly
  • Mechanical Complexity For Automatic Software

Solvent Primarily based Continual Ink Jet Electronic Printing

Continual ink-jet technological innovation has been tailored to mark on quite a few industrial merchandise which includes PCBs. With these devices a ongoing stream of ink droplets is steered to the wished-for area applying electromagnetic fields. Solvent dependent inks make lasting marks on porous surfaces. The marks are significantly less lasting on non-porous surfaces exactly where smearing might be a issue for the limited time its normally takes to dry.

Benefits

  • Aggressive Incremental Price tag
  • Large Distinction Mark
  • Lots of Colours Obtainable

Cons

  • Complicated Ink Viscosity Course of action Can Be Hard To Management
  • Large Resolution (Bigger Than 300 DPI) Hard To Accomplish?
  • Solvents Could Be Introduced Into Environment, Lots of Businesses Seeking To Lower Solvent Troubles
  • Mark Not Resistant To Some Cleansing Solvents

Laser Ablated Ink Patches

Lots of industries use lasers to engrave marks on to a assortment of elements. Lasers have been utilized to engrave marks on to Personal computer boards with minimal achievement because of to the deficiency of distinction of the ensuing mark. A more recent tactic is to have the circuit boards printed with ink patches, the ink patch is then selectively eliminated (ablated) by the laser generating the mark to be printed. (see here ) PPSI has the abilities to acquire a laser dependent marking method.

Benefits

  • Aggressive Incremental Price tag
  • Large Distinction Mark If Ink Patch Is Made use of
  • Quite Good, Very Trusted Marks Obtainable With Laser Galvo Head

Cons

  • Large First Price tag
  • Involves Preprinted Ink Patch
  • Even At Small Ability Laser warmth Could Harm (by Fracture) Traces, Leading to Intermittent Dependability Difficulties
  • Particle Era Could Need A Cleansing Stage

Piezoelectric Fall On Demand from customers Electronic Printing, Solvent Primarily based Ink

For a concise description of fall on need electronic printing see below [http://www.aellora.com/documents/whatisdodij.pdf]. In my view this alternative signifies a slight enhancement in excess of alternative two.

Benefits

  • Aggressive Incremental Price tag
  • Large Distinction Mark
  • Lots of Colours Obtainable
  • Less complicated Course of action To Management Than Continual Ink Jet

Cons

  • Standoff Length significantly less Than 2mm, Suited For Unpopulated Boards Only
  • Solvents Could Be Introduced Into Environment, Lots of Businesses Seeking To Lower Solvent Emissions
  • Mark Not Resistant To Some Cleansing Solvents

Piezoelectric Fall On Demand from customers Electronic Printing, Thermally Treated Ink

A startup business in Israel &#8220Printar&#8221 has launched a printer qualified at minimal quantity, rapid change PCB fabricators who want to minimize the price tag and direct time related with compact great deal display printing. Exciting is their thermally remedied ink that reportedly has superior adhesion capacity than other ink devices.

Benefits

  • Excellent Ink Adhesion ?

Cons

  • Involves Substantial Oven For 350-400 deg F Warmth Heal
  • Does Not Incorporate Large Quantity Content Managing

Piezoelectric Fall On Demand from customers Electronic Printing, UV Treated Ink

Markem Company has designed an ink/print head method ( the Design 4000, see here ) that a number of OEMs and integrators are applying to print on PCBs. The method utilizes an ink that is significantly less viscous at superior temperature and pretty much stable at area temperature. The print head operates at 68 deg C, the ink drops amazing when they get hold of the PCB getting to be pretty much stable. This will allow the method to print wonderful depth on PCBs with out ink functioning or smearing. When uncovered to UV mild the ink undergoes a chemical response getting to be a stable plastic like material. The remedied ink is impervious to widespread solvents.

Benefits

  • Aggressive Incremental Price tag
  • Large Distinction With Good Depth (600 DPI)
  • Just before Heal, the Ink Can Be Wiped Off And the Board Reprinted
  • Just after remedy, The Ink Can Not Be Eliminated Besides By Scraping
  • Large quantity Content Managing Obtainable
  • Performs Nicely With Inline Inspection (Examine Just before Heal, Heal Only Excellent Boards)

Cons

  • Ink Adhesion Can Be A Issue On Specific Substances
  • Involves the PCB Be Thoroughly clean (No Finger Oils)
  • Standoff Length Considerably less Than 2mm, Suited For Unpopulated Boards Only

The PPS 7000

The PPS7000 has been made to print individualizing marks on PCBs applying alternative six. The method utilizes a SMEMA suitable edge belt conveyor to transfer PCBs to the print spot exactly where they are printed and optically inspected. Just after inspection they are conveyed to the inline curing station and then out the again of the device. When staying immediately loaded by a board destacker, panels exit the method about after each and every 10 seconds. Each and every panel commonly consists of many boards that every single gets a one of a kind serial quantity. The in general throughput of the device is extremely dependent on the quantity of boards in every single panel. The far more boards in every single panel the increased the throughput in boards for each moment. A drag and fall WYSIWYG (What You See Is What You Get) programming method has been designed that will allow a new panel to be programmed in around five minutes. An offline programming method is also obtainable.

We are the only PCB board marking method that results in a lasting (solvent resistant) superior distinction mark, incorporates SMEMA suitable superior quantity product managing and incorporates inline inspection.

Upcoming Techniques

If the PPS7000 seems like it might fulfill your specifications the up coming stage is to print samples for you in purchase to validate that the ink will adhere properly to your substrates.

&duplicate 2006 by Prototype &amp Manufacturing Devices, Inc.

Totally free for endless distribution as extended as this copyright discover and url to http://www.prototypesys.com

Source by Chuck Raymond