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SMT007-July2021

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58 SMT007 MAGAZINE I JULY 2021 e task group quickly realized that industry needed a technical explanation of the require- ments and guidance to help with implementa- tion. e task group directed the Rhino Team to develop a white paper before the require- ments were put into IPC J-STD-001. Aer two years of work, there was consensus approval of IPC-WP-019. Unlike a standard, IPC-WP-019 provides the additional explanations, clarifica- tions, knowledge, and/or guidance on the sub- ject of cleaning requirements in preparation for incorporating those cleaning requirements in IPC J-STD-001. IPC-WP-019 takes the reader through an explanation of cleanliness requirements within Chapter 8 of IPC J-STD-001G. Scenarios are provided to assist the reader with examples of how the requirements can be implemented, and additional references available for guidance. Eleven months aer the release of the origi- nal IPC-WP-019, a revision of the white paper was released that aligned to the new cleanli- ness requirements forming the basis of IPC J-STD-001G Amendment 1. Because of the importance of cleanliness of electronic assem- blies, IPC J-STD-001G Amendment 1 would introduce the new cleanliness requirements to industry, and IPC-WP-019A would be there to help companies that wanted to begin imple- mentation. In 2020, IPC J-STD-001H was released. e revision of this document included changes to the cleanliness section, including additional information on what supporting objective evi- dence is required when qualifying a manufac- turing cleaning process. Supporting objective evidence is test data demonstrating that the performance of the product is not adversely affected in the service environment of Class 2 and Class 3 products. is may include test data from surface insulation resistance (SIR) testing, possibly in combination with ion chro- matography (IC), historical evidence demon- strating that residues have not caused failures in service, and electrical testing with power on during extremes of temperature and humid- ity which represent the end-use environment. ese changes prompted the Rhino Team to further revise IPC-WP-019 to ensure the explanations and support to industry would remain current. Today, IPC-WP-019B continues to support the industry and provide the explanations and information needed to assist companies using the cleanliness requirements of IPC J-STD- 001H. It's the how-to behind the requirements. For more information or to purchase IPC- WP-019B, visit IPC.org. SMT007 Debora Obitz is manager of IPC Technical Programs.

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