Exploration of terms such as components, components and components

- Aug 18, 2018-

1 preface Term (Term) is a general or special technical language within a professional scope. Its connotation is clear and specific in this major.It is the basis for the academic/technical specification of consensus and logic of coordination within the same profession or between related disciplines and application fields.It is also a brick stone in the ladder of learning professional knowledge and improving professional ability.The meaning of the term should be scientific, precise, concise and easy to understand so as to facilitate mutual understanding and correct use.My translation of common terms of SMT was written to facilitate the learning of new SMT learners. After it was published in the journal surface mount technology edited by Mr. Hu jinrong (the 1st issue of 2003 -- the 4th issue of 2004), it received a warm response in the industry, and many colleagues thought it was conducive to promoting the popularization and improvement of SMT level.Then various magazines in the industry reprinted (some did not tell me in advance), many readers have also called in a number of "SMT common term interpretation" did not cover the terms, asked me to give interpretation.I am very pleased that this attempt can help my colleagues in the industry to learn and work!!At the request of the reader, some more terms to try to interpret it.2 for "components" and "components" and "components" of the term release since a few years ago, a reader in the hope that I can to "components", "components" with the term "device" to read, I began to focus on the "components", "element" and "components" this three terms related to credit, just also found and learned about in the field of electrical and electronic most frequently used term "components", "element" and "devices", in the present can see aspects of the electrical and electronic teaching materials and its relevant technical data,Although there are detailed descriptions or descriptions of various electronic components, components and devices, the three terms "components", "components" and "components" are missing, and their contents are complete and concise.

In order to interpret the three terms "component", "component" and "component", write the interpretation that is supposed to be handed in.In addition to continuing to collect relevant information, often self-study. Also often with the industry's senior colleagues to discuss how to interpret it.I would like to review my interpretation of these terms as follows.2.1 credit information of "definition" and "interpretation" of the terms of "components" in the selected material has not been seen so far.The "definition" and "interpretation" of the terms "component" and "device" are selected as follows: 2.1.1 "interpretation" in cihai (August 1978, 1st edition)** element -- a device used in an electronic circuit to supply the basic parameters (resistance, capacitance, inductance) of the circuit.Generally refers to resistor, capacitor, coil, transformer, etc.Habit also means valve holder, plug, switch, etc.** electronic devices - general term for devices made by using and controlling the movement or energy state of electrons in vacuum, gas, and solids.There are two types of electric vacuum and solid electronic devices.Electronic devices are the main devices in various electronic devices.2.1.2 "defined" in ipc-t-50g CN(December 2003 edition)

Exploration of terms such as "components", "components" and "components"[source] : [author] : zeng shengzhi [publish date] : 2012-3-1 1 preface Term (Term) is a general or special technical language within a professional scope. Its connotation is clear and specific in this major.It is the basis for the academic/technical specification of consensus and logic of coordination within the same profession or between related disciplines and application fields.It is also a brick stone in the ladder of learning professional knowledge and improving professional ability.The meaning of the term should be scientific, precise, concise and easy to understand so as to facilitate mutual understanding and correct use.My translation of common terms of SMT was written to facilitate the learning of new SMT learners. After it was published in the journal surface mount technology edited by Mr. Hu jinrong (the 1st issue of 2003 -- the 4th issue of 2004), it received a warm response in the industry, and many colleagues thought it was conducive to promoting the popularization and improvement of SMT level.Then various magazines in the industry reprinted (some did not tell me in advance), many readers have also called in a number of "SMT common term interpretation" did not cover the terms, asked me to give interpretation.I am very pleased that this attempt can help my colleagues in the industry to learn and work!!At the request of the reader, some more terms to try to interpret it.2 for "components" and "components" and "components" of the term release since a few years ago, a reader in the hope that I can to "components", "components" with the term "device" to read, I began to focus on the "components", "element" and "components" this three terms related to credit, just also found and learned about in the field of electrical and electronic most frequently used term "components", "element" and "devices", in the present can see aspects of the electrical and electronic teaching materials and its relevant technical data,Although there are detailed descriptions or descriptions of various electronic components, components and devices, the three terms "components", "components" and "components" are missing, and their contents are complete and concise.In order to interpret the three terms "component", "component" and "component", write the interpretation that is supposed to be handed in.In addition to continuing to collect relevant information, often self-study. Also often with the industry's senior colleagues to discuss how to interpret it.I would like to review my interpretation of these terms as follows.2.1 credit information of "definition" and "interpretation" of the terms of "components" in the selected material has not been seen so far.The "definition" and "interpretation" of the terms "component" and "device" are selected as follows: 2.1.1 "interpretation" in cihai (August 1978, 1st edition)** element -- a device used in an electronic circuit to supply the basic parameters (resistance, capacitance, inductance) of the circuit.Generally refers to resistor, capacitor, coil, transformer, etc.Habit also means valve holder, plug, switch, etc.** electronic devices - general term for devices made by using and controlling the movement or energy state of electrons in vacuum, gas, and solids.There are two types of electric vacuum and solid electronic devices.Electronic devices are the main devices in various electronic devices.2.1.2 "defined" in ipc-t-50g CN(December 2003 edition)*** Component 30.0236An individual part or combination of parts that, when together, perform a design function(s). (See also "Discrete Component")** component 30.0236(see the following translation)* single component or combination of multiple components capable of performing certain design functions (see "discrete component").** single parts or combinations of multiple parts perform a design function when assembled (see "discrete components").*** single or multiple component combinations to achieve certain circuit functions (see "discrete components").* * * Discrete 'Component 30.0392 A separate part of A printed board assembly that performs A circuit function, e.g., A resistor and A capacitor, A transistor, etc.*** "discrete components"* independent parts, such as resistors, capacitors, and transistors, that perform a circuit function in PCB assemblies.** provides independent components with a single electrical function in the circuit, such as resistors, capacitors, and transistors.***Device 30.0369An individual electrical circuit element that cannot be further Reduced without institution.*** device 30.0369

2.3 the interpretation of the three termsThe although wrote the "components", "element" and the term "device" before reading done related information collection, analysis and thinking, but in the process of writing, still had to find north, in a summarized description (especially the distinction between "element" and "components"), and proposed the "interpretation" and "scientific, precise," concise requirements like has the feeling of distance and difficult to appropriate...It seems that the "interpretation" of these three terms is much more difficult than I originally thought....This may be the case, I suppose, that people who are well aware of the importance of glossary definitions to academic/technical writing may be forced to avoid these three terms because it is so difficult to write a concise explanation that is consensual.There are many different kinds of electronic components, rapid progress in varieties, characteristics or circuit different function, in order to better overview "components", "element" and the term "device", in the whole process of writing, I keep the actual is now in use of all kinds of electronic components over and over again and carefully analysis, combing with inductive, from "the outside electrode, its features or circuit function, to form a electronic/or electric circuit, the basic single independent body" of generalization and description, it gradually walked out of the confusion, finally wrote may think their papers for a reading of the following:*** Electronic components &Device has the properties of gold electrode (such as/pin/lead solder ball, terminations, pin, welding, etc.), can change or control the state of the electron flow, after interconnected to form a circuit of the electrical and/or electronic electricity the most basic of all kinds of a single individual (such as independent sealing body, combination independent body, combined with independent body).*** Electronic Component is a general term for the most basic individual independent bodies (such as encapsulated independent bodies and combined independent bodies) that have a gold attribute external electrode (such as lead/pin, welding end, insertion pin, welding sheet, etc.) and a single feature/or a simple circuit function after interconnection.

3.1 "interpretation" or "definition" of the term "lead-free solder" can be seen as follows:** it is generally believed that lead-free solders can only be counted when the content of lead is less than 0.1 -- 0.2 % (weight percentage).** means that lead is not artificially added to the solder. The natural content of lead in the solder alloy is less than 0.1 %. Wt does not contain any other harmful elements in ROHS instruction.** is "defined" in ipc-t-50g CN(December 2003 edition) as follows: lead-free solder 75.1904An all0y that does not contain more than 0.1 % Lead(Pb) by Weight as its Constituent and is used for joining components to substrates orLead free solder 75.1904 (see below) an alloy whose percentage of weight of lead is not greater than 0.1% used to connect components to substrate or coating Surfaces.3.2 I am "lead-free solder" with the term "tin-lead solder" agent release, I think these to the term "lead-free solder" "interpretation" or "definition", as the electronics industry technology exchange, everyone has understood a sense of "lead-free solder" verbal expression is ok, but if as a "standard", "teaching" and "paper" on the text in the statement is wrong and harmful, because such "interpretation" or "definition" do not conform to the requirements of the "scientific, exact, easy to mislead many newcomers (will form the basic concepts of habitual).This is because:A). An alloy is a metal material which is formed by combining one metal element with other metal elements/or non-metal elements in different proportions by smelting/or other methods and whose properties are different from the original metal elements.B). It is well known that any alloy solder, in addition to the composition of several matrix elements in different proportions, will inevitably mix with other impurity elements.Therefore, in "interpretation" or "definition", it must be pointed out that those elements are the matrix metal components required to form the alloy solder, and those elements are the impurity metals (i.e. components in non-alloy solder).It is unscientific and wrong to generalize "impurity metals" to be alloy solder "components."

C)..The content of impurity lead in lead-free solder should be less than 0.1 % or 0.2 %.To sum up, my interpretation of the terms "lead-free solder" and "tin-lead solder" is as follows:*** lead-free solders/lead-free solder/ pb-free solder Lead is no longer one of the matrix metal components (s) that make up solder alloys; instead, Lead is regarded as a harmful impurity and its weight must be strictly limited to an extremely small range (e.g., a content of less than 0.1 -- 0.2 %).*** Tin solder/Tin - Leadsolder/sn-pbsolder solder and lead are solder solders made of one of the base metal components of the solder alloys.The surrounding environment is coming into contact with The system or componentin question. The surrounding environment is coming into contact with The system or component of The system under study.I think the above "definition" of "environment" seems too narrow and far removed from the actual environment in which people work in the electronics industry as a whole.For this reason, the following "interpretation" seems more appropriate: Ambient /Ambient surrounding space related to people's activities.* Design/Design is the general term used to translate people's ideas/ideas about a product into the activities, processes, or results that guide the production of a product's drawings and related documents.

* about The term "Aging" in The IPC - T - 50 g CN (Chinese version) in December 2003 The term "Aging" "definition" is as follows: 90.0025 The Aging change of a property, e.g., solderability, with time. (See also "Accelerated Aging") Aging With the passage of time, and cause features (such as weldability) changes.(see also "Accelerated Aging, Accelerated Aging") I think the "definition" of the term "Aging", its generalization and description must be combined with "products/materials, because of influenced by external factors" and must also emphasize the "original" and "irreversible" and "degeneration" rather than just saying "features" and "change" to scientific and exact express all the meaning of "ageing".For this reason, it seems better to change the "interpretation" as follows: Aging/Aging products/materials, due to external factors, their original characteristics (or parameter values) have irreversible regression with time delay.* Defect/Defect refers to the general term of product, component/component, part, etc., which refers to the parameter values, phenomena, problems, etc. that do not conform to the technical conditions, drawings, acceptance standards or certain requirements specified in the contract signed with the manufacturer/user.disqualificationWarning * Process/Process indicator refers to in the Process of machining, the is not completely meet the acceptance standard stipulated in the "receiving/qualified". And has yet to reach the requirements of the "defect/reject" regulation, only reflect the material, Process equipment/parameters, test, Process, personnel operation caused some changes will not affect the product/component form, function, installation and/or assembly, reliability requirements of some anomalies, situation and problems.Synonym: process warning, process warning, process warning* minimum electrical distance/minimum electrical distance between uninsulated conductive objects which shall not be conductive to each other under specified altitude and voltage conditions, sufficient to prevent the minimum distance between the permitted adjoining of the dielectric breakdown or/and the corona discharge phenomenon.