DIN EN 16602-70-07:2015-01

Wave soldering is regarded as a critical process that can find limited application during the assembly of components on to printed circuit boards (PCBs) intended for spacecraft. The preferred procedure is by manual soldering to the requirements of ECSS-Q-ST-70-08. Generally the small number of identically designed circuits does not warrant the setting up of unique machine parameters for each individual layout. When wave soldering is identified as a suitable alternative to manual soldering for use in the customer's projects, it can be essential to follow the steps outlined in this document before the final customer's approval is granted. The sequence of main events is shown in Figure 4-1. Each step is fully completed and the details recorded, so that a dossier is compiled for each manufacturer's assembly line. All dossiers are kept updated by the approval authority and serve as a reference for the approval authority's Project Engineers. A general qualification is not granted for wave soldering. Wave soldering lines that have been previously verified (see also 5.2) can be also approved for use on named projects, but this depends entirely on the specific project requirements. Project process approval is requested, as for all materials and critical processes, by means of ECSS-Q-ST-70. This specification defines the basic requirements for the verification and approval of automatic machine wave soldering for use in spacecraft hardware. The process requirements for wave soldering of doublesided and multilayer boards are also defined. This standard may be tailored for the specific characteristic and constrains of a space project in conformance with ECSS-S-ST-00. This document (EN 16602-70-07:2014) has been prepared by Technical Committee CEN/CLC/TC 5 "Space", the secretariat of which is held by DIN (Germany). This document will supersede DIN EN 14612:2004-05. This document has been developed to cover specifically space systems and has therefore precedence over any European Standard covering the same scope but with a wider domain of applicability (for example: aerospace).