Please help us understand your situation better by describing the following: * Component [ie, PTH/SMT, type of component, lead finish you expected/ received, etc.] * Board type [ie, type of board FR-4/CEM/ceramic, etc.] * Solderability protection on pads [ie, hot air solder leveled, gold over nickel, etc.] * Solder mask on board * Solder used * Soldering process
When you say, �If the gold plating is missing�, what gold plating are you talking about � * Component leads * Solderability protection on the pads on the board * Er, what
Continuing, when you say, �If the gold plating is missing�, what is in place of the gold plating? Does this replacement surface accept solder?
Commonly, when we talk substrate, we talk �
Substrate. Base Material. A supporting insulating material upon which parts, substrates, and elements are attached. Base Material. Substrate. In printed circuit board fabrication, the insulating laminate on which the conductor pattern is formed. The base material may be rigid or flexible.
So, when you say, �� what metal substrates are commonly used�, we scratch our heads. Not to say no one uses metal substrates, but they�re no common. Help us understand your question better.
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