One of the greatest challenges electronics manufacturers continue to face in complying with the ever-expanding set of regulated chemical substances today is being aware of – in advance – whether any of the regulated substances are contained in their products.
Despite a decade or more of demanding information on substances from their supply chains, the vast majority of manufacturers have little knowledge about substances beyond the RoHS six: lead, mercury, cadmium, hexavalent chromium, PBBs and PBDEs. And despite the Joint Industry Guide, JIG-101, having been around since 2005 now supplanted by IEC 62474, most manufacturers can't even seem to get information on that set of substances from much of their supply base. And with the list of disclosable REACH Substances of Very High Concern SVHCs at 151 heading toward as many as 500 by 2020, the industry appears to have a long way to go.What is going on? Why is this the case? And what needs to change? I'll try to provide some answers and direction in this post.Except in rare instances, Electronics OEMs historically didn't really care what materials were in their products. Awareness of substance identity often didn't come to light unless there was a problem with form, fit, function, quality, reliability or availability. You didn't really care whether the ceramic of that 20pf C0GThe main differences between ceramic dielectricThe insulating material between the plates of the capacitor. The material is chosen for its ability to permit electrostatic attraction and repulsion to take place across it. The material will have the property that energy required to establish an electric field is recoverable in whole or in part, as electric energy. In other words, a good dielectric material is a poor conductor of electricity while being an effective supporter of electrostatic fields. types are the temperature coefficient of capacitanceThat property of a system of conductors and dielectrics which permits the storage of electricity when potential difference exists between the conductors. Its value is expressed as the ratio of a quantity of electricity to a potential difference. A capacitance value is always positive., and the dielectricThe insulating material between the plates of the capacitor. The material is chosen for its ability to permit electrostatic attraction and repulsion to take place across it. The material will have the property that energy required to establish an electric field is recoverable in whole or in part, as electric energy. In other words, a good dielectric material is a poor conductor of electricity while being an effective supporter of electrostatic fields. loss.Ceramic capacitors tend to have low inductance because of their small size. 0805 SMTDiscrete miniature capacitors which are packaged without leads and fastened directly to foil patterns. capacitor contained lead or not; you just cared whether its capacitanceThat property of a system of conductors and dielectrics which permits the storage of electricity when potential difference exists between the conductors. Its value is expressed as the ratio of a quantity of electricity to a potential difference. A capacitance value is always positive. was 20pf and its electrical properties followed C0GThe main differences between ceramic dielectricThe insulating material between the plates of the capacitor. The material is chosen for its ability to permit electrostatic attraction and repulsion to take place across it. The material will have the property that energy required to establish an electric field is recoverable in whole or in part, as electric energy. In other words, a good dielectric material is a poor conductor of electricity while being an effective supporter of electrostatic fields. types are the temperature coefficient of capacitanceThat property of a system of conductors and dielectrics which permits the storage of electricity when potential difference exists between the conductors. Its value is expressed as the ratio of a quantity of electricity to a potential difference. A capacitance value is always positive., and the dielectricThe insulating material between the plates of the capacitor. The material is chosen for its ability to permit electrostatic attraction and repulsion to take place across it. The material will have the property that energy required to establish an electric field is recoverable in whole or in part, as electric energy. In other words, a good dielectric material is a poor conductor of electricity while being an effective supporter of electrostatic fields. loss.Ceramic capacitors tend to have low inductance because of their small size. characteristics for stability over time and temperature. And you really didn't care what flame retardant and colorant was in that gray plastic front bezel; you just cared that it met UL94 V-0 flammability requirements and is the right Pantone? color. Oh, and that it didn't fade too quickly due to exposure to light.