Speed and Throughput in Next-Generation Stencil Printing

Introduction

In simplest terms, a faster printer logically means higher throughput. Overall speed, however, is dependent upon a number of factors including the individual cycle times for various steps in the print cycle (e.g., stencil wiping frequency, board separation and printing speed). A stencil printer’s overall throughput speed, per board printed, must also be tied to the capabilities of the line; in other words, there is no benefit in having a fast printer and/or high-speed placement machine if line speed is governed by the reflow oven at the end of the line, with a fixed time/temperature profile that is significantly slower. Line configuration and balancing, and thus overall line optimization, is therefore an essential part of realizing the maximum benefit from a high-speed, printer capable of handling volume production.

Stainless steel foil stencils are used to print solder paste and adhesives on bare PCBs. Stencils of varying thickness, and also ‘step’ stencils with varying thicknesses in specific areas for different deposition requirements are used.
Solder Paste, a complex mixture of tiny particles of solder alloy and flux vehicle, is a challenging material to print onto a bare Surface Mount Technology (SMT) PCB.
Traditional metal screens excel in the printing of many electronic materials on rigid and flexible PCBs. These materials include solder masks and resists, fluxes and solder pastes, and especially conductive inks (silver, carbon, silver chloride), and dielectric inks, both used to form conductive traces, capacitor and resistor elements.
MPM stencil printers pioneered Surface Mount Technology (SMT) solder paste printing and continue to lead the industry in performance and excellence in printing electronic materials, including SMT Solder Paste.
PrintingMPM printers are high-speed, high-precision systems for depositing precise patterns of solder paste on printed circuit boards through foil stencils. Available in a wide range of capabilities.Best-in-class printing performance has always neen a hallmark of MPM printing technology, the recognized world standard for reliability, throughput, and high yields.