Zestron和Heraeus日前宣布在合作為客戶提供產品清洗工藝解決方案方面覺得里程碑式結果。 The recent round of tests evaluated ten solder pastes made of various no-clean and water-clean formulations. Among them were the high performance F377 no-clean, tin-lead solder paste and the new lead-free, halogen-free water cleanable F543. ZESTRONs VIGON A 201 and ATRON AC 205 were used in inline, batch and ultrasonic cleaning processes for the experiments. In addition to characterizing the ability to clean the solder pastes flux residues on reflowed assemblies, the effort also examined each paste in its unreflowed state to identify the best methods of removal from stencils and misprinted circuit cards. These tests are another installment of a long-running cooperative program in which ZESTRON develops cleaning processes for Heraeus new soldering products in one of their state-of-the-art technical centers. The most recent effort was led by ZESTRONs Senior Process Engineer Ravi Parthasarathy at their Manassas, VA facility and was supported by Heraeus West Conshohocken, PA, RD organization. Other ZESTRON technical centers are located in Ingolstadt, Germany, Shanghai, China and Kulim, Malaysia, and work with Heraeus development teams from Hanau, Germany, and Singapore. Application bulletins for cleaning Heraeus newest solder paste formulation are now available. They contain recommended operating parameters for inline, batch, ultrasonic, stencil and misprint cleaning. They also include suggested concentrations, temperatures, timing and rinse information as applicable for each process. Copies of the bulletins may be obtained by contacting Ms. Dawn Lehman at Heraeus (dawn.lehman@heraeus.com) or Ms. Sabine Braun at ZESTRON (s.braun@zestronusa.com). For more information about ZESTRON products and services please visit www.zestron.com.
